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Old 02-06-2011, 07:23 PM   #1
pedro6371
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283 with camel hump heads

Is it anybody done this I have a 283 block ready to rebuild got it for free and I just bought a set of double hump heads really cheap screw in studs and 2.02 1.60 I like to know if any of you guys done this before any info I'll be nice thanks btw the block it's out of a 61 chevy truck STD bore and steel crank.
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Old 02-06-2011, 09:39 PM   #2
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Re: 283 with camel hump heads

I would find a set of 601 casting 305 heads. they have a 53 cc chamber and then you will have accessory holes and hardened exhaust seats. I've used them on 327's with great results and the are cheap. I've never used the double bumps on any 283's or 327's before.
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Old 02-06-2011, 09:58 PM   #3
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Re: 283 with camel hump heads

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Originally Posted by pedro6371 View Post
Is it anybody done this I have a 283 block ready to rebuild got it for free and I just bought a set of double hump heads really cheap screw in studs and 2.02 1.60 I like to know if any of you guys done this before any info I'll be nice thanks btw the block it's out of a 61 chevy truck STD bore and steel crank.
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scrap the block and get a 350 block..... 302 time is a brewin'
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Old 02-06-2011, 10:03 PM   #4
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Re: 283 with camel hump heads

I have 283 in 68 c10. My truck is a dog. Get a bigger motor. Truck is in Granada Hills if you want to check it out before spending money on a 283.

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Old 02-06-2011, 10:12 PM   #5
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Re: 283 with camel hump heads

i would think that a 283 would work nicely with camel humps depending on the rear end and trans you have to make up for the low torque number that its going to produce? we have one in the field at friends farm with a 283, speed and 4.10s and it moved down the road just fine
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Old 02-06-2011, 10:58 PM   #6
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Re: 283 with camel hump heads

What is the casting number of your double hump heads? If they have the smaller 64cc chambers, they will be just fine on a 283. They likely won't be the best you could get, but if that's what you have, then use them.
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Old 02-06-2011, 11:08 PM   #7
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Re: 283 with camel hump heads

i put a set of z28 302 heads on my 283 in high school. 30/30 cam intake & all. i bent a set of intake valves & pushrods before i discovered the intakes were hitting the top of the block. wound up having to notch the block like 454s are. they killed the low end torque the engine had with the power packed heads. but after i installed the old 'vette 2x4 intake & carters it was a real screamer- but only with a 4.88 rear diff. the 305 vortecs or power packs are much more 283 friendly.
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Old 02-06-2011, 11:38 PM   #8
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Re: 283 with camel hump heads

thanks guys for all your answers i was just looking for some vortecs but they ask to much money i got this double humps for 100 bucks part no 3890462 with 202 1.6 screw studs they are clean my block i had it for free a 283 may be i just lok for a 350 block im building this in the lowest budget i can thanks.
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Old 02-07-2011, 11:07 PM   #9
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Re: 283 with camel hump heads

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What is the casting number of your double hump heads? If they have the smaller 64cc chambers, they will be just fine on a 283. They likely won't be the best you could get, but if that's what you have, then use them.
haha you run what ya brung club for me too. If ya got it use it!
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Old 02-07-2011, 11:27 PM   #10
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Re: 283 with camel hump heads

From a budget perspective, the parts for building a 350 will cost less than the parts for a 283.

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thanks guys for all your answers i was just looking for some vortecs but they ask to much money i got this double humps for 100 bucks part no 3890462 with 202 1.6 screw studs they are clean my block i had it for free a 283 may be i just lok for a 350 block im building this in the lowest budget i can thanks.
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Old 02-07-2011, 11:57 PM   #11
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Re: 283 with camel hump heads

Jeez. Total investment so far is $100 and you guys poo poo it....

I had a 62 impala with a 283 that would rip your head off in 1974. All stuff a guy in high school could buy on 3.00hr job and build in a garage. Are you going to work with a shop to clean up the block etc. or try and do it on your own? If budget is key, have the block checked out so you know where you sit with it. Options from there on will have to do with what you can spend. So may options today, from a junkyard low mileage late model, to build a classic, to build a monster. So many opinions today that all that really matters is what you want to do and what you want to spend. The cheapest is a running motor to just drop in.

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Old 02-08-2011, 02:46 AM   #12
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Re: 283 with camel hump heads

I had a 283 with 202 camel hump heads w/3 speed on my 66 and it ran like a raped ape!!
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Old 02-09-2011, 06:07 AM   #13
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Re: 283 with camel hump heads

you made $3 hr in high school? dang, i only made $1.65!
oh yeah i love 283s!
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Old 02-09-2011, 08:22 AM   #14
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Re: 283 with camel hump heads

It's just a simple fact that less CID = less power. Doesn't mean any engine is a "dog"; it just means that at the same build level you'll make less power...for right around the same money - or more, since 350 parts are the most common and so the cheapest.
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Old 02-09-2011, 08:36 AM   #15
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Re: 283 with camel hump heads

Geezz Guys!
462 double humps are nice heads... true you dont have accessory holes... but they flow pretty well!

If you have a really good machine shop, go talk to them about a good combo and call the cam company of your choice and get their opinion... (they will want to know your transmission, rear gear ratio, etc...)

I dont know what youre putting it in, but that will make a good little motor...

Will it be as strong as a 350? no... But it will be good and different
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Old 02-10-2011, 11:49 PM   #16
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Re: 283 with camel hump heads

its what i like to acomplished if i can allengator its going on a 61 apache something different most of people has a 350
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Old 02-11-2011, 11:42 AM   #17
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Re: 283 with camel hump heads

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they flow pretty well!
Just so we're talking apples and apples - a set of '462-type castings will flow around 185 CFM intake with 1.94 intake, as high as 210 or so with 2.02s. A bit of touching up may increase that a bit.

A stock, out of the box set of Vortecs will flow around 235-240 CFM...25-30 more...and cost significantly less than rebuilding a set of stock heads - and WAY less than rebulding and PORTING a set of stock heads.

For a 283, not a big deal, I agree.
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Old 02-11-2011, 11:54 AM   #18
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Re: 283 with camel hump heads

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Just so we're talking apples and apples - a set of '462-type castings will flow around 185 CFM intake with 1.94 intake, as high as 210 or so with 2.02s. A bit of touching up may increase that a bit.

A stock, out of the box set of Vortecs will flow around 235-240 CFM...25-30 more...and cost significantly less than rebuilding a set of stock heads - and WAY less than rebulding and PORTING a set of stock heads.

For a 283, not a big deal, I agree.
I am a huge VORTEC fan...
But given that he is not trying to build a street strip motor... And that he already has the 462's, he will be out less money than going the VORTEC route... Don't forget the costs of a new intake and valve covers for the vortec heads....

Not to mention the "old school" cool factor...
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Old 02-11-2011, 07:46 PM   #19
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Re: 283 with camel hump heads

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Is it anybody done this I have a 283 block ready to rebuild got it for free and I just bought a set of double hump heads really cheap screw in studs and 2.02 1.60 I like to know if any of you guys done this before any info I'll be nice thanks btw the block it's out of a 61 chevy truck STD bore and steel crank.
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Thousands, no, make that hundreds of thousands of 283's were built with those heads but most had big ass cams and pistons with domes like a small mountain for 11 to 1 or better compression, didn't start making power until about 6500 and were in a nice light car with 4.56 or lower gears. $100 for good '462 heads was a good buy but on a basically stock 283 the old Power Pak heads or 305 heads would work a LOT better below 6,000 RPM and if your stock factory hydraulic cammed truck 283 will turn 6,000 for very long then you need a new tach 'cause yours is lying to you.

Just because it's cheap and that's the way we used to do it doesn't make it right. I look back at what we thought was the hot setup 35 years ago and just shake my head. With the larger runners in the '462s and 2.02/1.60 valves you're losing a ton of mixture velocity with the small cubes of the 283. It just can't move that much air. I have a copy of a very intersting test Car Craft did years ago on a 283 in a '66 Chevelle. They started with a set of '461 Double Humps on it with 1.94/1.50 valves. Then they swapped in a Performer cam and put on a set of 283 Power Pak heads with some mild port work and a 3 angle valve job on the 1.72/1.50 heads. It not only picked up several MPG's and had better off idle response but it was about a full second quicker in the 1/4. I have a scan of it on a PDF file if anyone would like to see it. I've seen similar results first hand over the years as well.

Put a roller cam 350 short block under those heads with the HT383/Ramjet roller cam and you'll have a real sweet combo. Don't get too excited about your 283 having a steel crank, 99.99% of 283's came with forged steel cranks. I've been playing with SBC's since 1972 and have seen the insides of hundreds of 283's and have yet to see one with a cast iron crank. They're out there but I've never personally seen one.

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