1975 1/2 TOn Pickup - The 1947 - Present Chevrolet & GMC Truck Message Board Network

King_Cobra · 05-04-2002, 11:19 PM

Is it unusual for a 1975 Chevrolet 1/2 Ton pick up to come with a 12 bolt rear end in it from the factory. Because my pick up has one and I was wondering if it would hold up against a 900 horse small block 350. Or would the torque from the 350 damage the 12 bolt? The 350 has been bored and stroker to 454 if that helps any.

chevy68388 · 05-05-2002, 09:05 PM

ok yes its stock i have a 12bolt in my 79 but one thing its not going to handle 900hp and how in the hell didu make a 350 to a 454 i kinda think u are bull****ing cause i have a 350 bored .60 over with a 400 crank and its only 388 and as far as i know thats as big as u can go

Big69C20 Toy · 05-05-2002, 09:42 PM

I suppose theorhetically it's possible with enough overbore and some MAJOR stroke. Never heard of no 454 outa a 350, but 900 ponies and similar torque will bust a 12 bolt, gotta get a nice beefy aftermarket axle, i dont even think a big ole 14 bolt will hold 900 well under HEAVY loading.

------------------
69 Custom 20, 396BB,Longbed fleetside.
New Oak Bed With SS strips... damn nice.

Edelbrock performer RPM-O, Edelbrock 750Carb, Headers, HEI, 2 40" glasspacks.
Stereo: Classic-style tape deck/radio, 2 6x9 Cerwin Vega's in doors, 2 10" Neo subs under seats, 1 900 Watt amp.

SN= Ares220

SCOTI · 05-05-2002, 09:56 PM

10" tire classes use 10 bolts that can handle the power so a 12 bolt theoretically could also but the catch is applying enough power to effectively move the car w/o destroying parts or blowing the tires away. The way these cars move down the track is a science as well as an art form. Dave Henninger(sp?) use to campaign a 70 camaro w/fi small block then went to a 6cyl w/juice to take advantage of weight vs. power adder in that particular class & both combos utilized a 10 bolt & made similar power.

King_Cobra · 05-06-2002, 12:15 AM

The 350 that I turned into a 454 was a custom made LS1 engine that has been selling for $3,600 I don't remember the exact bore and stroke but I will have to find it sometime.

slam33 · 05-06-2002, 10:01 AM

First off your not going to get 454 cube out of a small block and spend under $4000. You can't bore the holes that big and find a crank with that big a swing that will clear the block. Even if you buy a World or Dart block. Second, unless your building a one run motor, 900 hp is only a dream. To build it, it's going to run well over $10,000. I built offshore BB motors in the 540+ cube size, I've done twin turbo SB, blown SB, and multi motor drag cars, so I think I know a bit about this. If your building a drag truck then you already know that a 12 bolt might handle it if you build it right, but why would you want to run a 12 bolt when you should be looking at a 9 inch Ford. If your building a street truck, and your question suggest your are, then lets stop dreaming and get back to reality, please. Sorry about being a bit harsh but I've been doing this stuff for almost 40 yrs. and I've seen this dream come and go a thousand times.

------------------
71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

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05-04-2002, 11:19 PM	#1
King_Cobra Registered User Join Date: Apr 2002 Location: Quincy, WA, USA Posts: 25	1975 1/2 TOn Pickup Is it unusual for a 1975 Chevrolet 1/2 Ton pick up to come with a 12 bolt rear end in it from the factory. Because my pick up has one and I was wondering if it would hold up against a 900 horse small block 350. Or would the torque from the 350 damage the 12 bolt? The 350 has been bored and stroker to 454 if that helps any. __________________ 1945 Chevy 1/2 Ton 1953 Suburban 1955 SWB Big Window 2 1959 Chevy Fleetside 1966 Chevy 1/2 Ton 1975 1/2 Ton 1984 1/2 4X4

05-05-2002, 09:05 PM	#2
chevy68388 king $h!t Join Date: Jan 2002 Location: spring valley/ohio/usa Posts: 416	ok yes its stock i have a 12bolt in my 79 but one thing its not going to handle 900hp and how in the hell didu make a 350 to a 454 i kinda think u are bull****ing cause i have a 350 bored .60 over with a 400 crank and its only 388 and as far as i know thats as big as u can go __________________ j dawg the 86 allmost done 357/700r4/lifted 9/dana44 front ten bolt rear/3.73 gears/35s

05-05-2002, 09:42 PM	#3
Big69C20 Toy Livin' it up. Join Date: Nov 2001 Location: Richland, MI Posts: 2,212	I suppose theorhetically it's possible with enough overbore and some MAJOR stroke. Never heard of no 454 outa a 350, but 900 ponies and similar torque will bust a 12 bolt, gotta get a nice beefy aftermarket axle, i dont even think a big ole 14 bolt will hold 900 well under HEAVY loading. ------------------ 69 Custom 20, 396BB,Longbed fleetside. New Oak Bed With SS strips... damn nice. Edelbrock performer RPM-O, Edelbrock 750Carb, Headers, HEI, 2 40" glasspacks. Stereo: Classic-style tape deck/radio, 2 6x9 Cerwin Vega's in doors, 2 10" Neo subs under seats, 1 900 Watt amp. SN= Ares220 __________________ -Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.

05-05-2002, 09:56 PM	#4
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,910	10" tire classes use 10 bolts that can handle the power so a 12 bolt theoretically could also but the catch is applying enough power to effectively move the car w/o destroying parts or blowing the tires away. The way these cars move down the track is a science as well as an art form. Dave Henninger(sp?) use to campaign a 70 camaro w/fi small block then went to a 6cyl w/juice to take advantage of weight vs. power adder in that particular class & both combos utilized a 10 bolt & made similar power. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

05-06-2002, 12:15 AM	#5
King_Cobra Registered User Join Date: Apr 2002 Location: Quincy, WA, USA Posts: 25	The 350 that I turned into a 454 was a custom made LS1 engine that has been selling for $3,600 I don't remember the exact bore and stroke but I will have to find it sometime. __________________ 1945 Chevy 1/2 Ton 1953 Suburban 1955 SWB Big Window 2 1959 Chevy Fleetside 1966 Chevy 1/2 Ton 1975 1/2 Ton 1984 1/2 4X4

05-06-2002, 10:01 AM	#6
slam33 Registered User Join Date: Aug 2001 Location: Long Beach, Ca Posts: 1,432	First off your not going to get 454 cube out of a small block and spend under $4000. You can't bore the holes that big and find a crank with that big a swing that will clear the block. Even if you buy a World or Dart block. Second, unless your building a one run motor, 900 hp is only a dream. To build it, it's going to run well over $10,000. I built offshore BB motors in the 540+ cube size, I've done twin turbo SB, blown SB, and multi motor drag cars, so I think I know a bit about this. If your building a drag truck then you already know that a 12 bolt might handle it if you build it right, but why would you want to run a 12 bolt when you should be looking at a 9 inch Ford. If your building a street truck, and your question suggest your are, then lets stop dreaming and get back to reality, please. Sorry about being a bit harsh but I've been doing this stuff for almost 40 yrs. and I've seen this dream come and go a thousand times. ------------------ 71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410 " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A> __________________ 71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A>



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