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10-11-2017, 10:31 AM
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#1 |
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Registered User
Join Date: May 2007
Location: nepa
Posts: 745
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Stock top end build
I was considering doing a top end build on a stock 350. stock pistons rods and crank, all from 76.. Has about 80,000 miles. Wanting more power around 300 something for a daily driver and for towing some times. Bad or Okay idea?
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10-11-2017, 10:42 AM
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#2 |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,331
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Re: Stock top end build
My 76 has 175K on the stock bottom end and still going strong. There may be better options to get more power, like a new Vortec engine for $2k. My truck came with a Trick Flow high torque 350 hp top end kit. I wasn't using the extra power so I put it on my Camaro and put the truck back to stock. There was a big difference in power all through the rpm range.
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76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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10-11-2017, 11:03 AM
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#3 |
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Registered User
Join Date: May 2007
Location: nepa
Posts: 745
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Re: Stock top end build
right now the PO had put a howards cam https://howardscams.com/i-24076037-h...-camshaft.html and an edelbrock rpm intake and 600 edelbrock carb. its okay but want alittle more.
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10-11-2017, 01:14 PM
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#4 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: Stock top end build
Leak down test.
If that shows favorable go with the plan. If not you may create a mosquito fogger when tightening up the top end. Removing the heads and accessing carbon patterns & cylinder ridge will tell more.
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1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
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10-11-2017, 11:16 PM
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#5 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Stock top end build
Most will tell you to never put rebuilt or new heads on a well used short block. I have done it several times with good results. It partly depends on how much more life you are expecting out of the engine after the work. I agree with doing a compression and leak down test on the engine first.
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10-12-2017, 08:54 AM
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#6 |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,331
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Re: Stock top end build
My 175K engine has the biggest ridge I ever saw on the top of the cylinders but it still doesn't puff any smoke. I'm kinda curious how far it will go. I still tow cars on 1000 mile road trips with it. I seem to have plenty of power for towing cars but if I lived out west with bigger mountains I may be wanting for more power. You do have dual exhaust don't you? Mine just has a Performer cam and headers.
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76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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10-12-2017, 09:48 AM
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#7 |
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Registered User
Join Date: May 2007
Location: nepa
Posts: 745
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Re: Stock top end build
Mine has 2 1/4 dual exhaust but still has stock exhaust manifolds. Im planning on putting heads on it in the near future. Cap, I generally use it to go to a couple shows about 250 miles away ea., towing every so often and snow days to work. Since I've bought it in 2015, I had only put about 8000 miles on it. I generally plan on using it the same each year. Till I find another show to haul the family to.
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