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Old 10-14-2019, 09:29 PM
bober bober is offline
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Default curious ; 462 in a 70's GMC ? Any one completed one ?

I'm curious about the possibility of installing a 462 in a truck ? I have a 462 going to dyno it next week and I would like to have a pick up . I don't have anything to put it in as of yet . JUST THINKING !!!

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Old 10-14-2019, 11:15 PM
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It can certainly be done. Starter is on the wrong side vs chevy, use a bop to chevy trans adapter. Usually just use the engine mount off the frame of a car to go and set the engine down into the chassis with the motor mounts on. I even know 2 guys that have put 455 pontiacs in 70s 4x4 FORD pickups, one has ram air manifolds and the new process 4 speed from the ford 300 6 behind the 450 hp 455.

This thread had some good details for a swap for a 2wd.

http://forums.maxperformanceinc.com/...d.php?t=596830


Last edited by Jay S; 10-14-2019 at 11:16 PM. Reason: Edit
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Old 10-14-2019, 11:21 PM
Goatracer1 Goatracer1 is offline
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I installed a 455 Pontiac in a 1963 Chevy 1/2 ton 2wd. If you use the correct parts it's a bolt in. Removed 6 cyl. mounts. Used the U-shaped steel Pontiac upper motor mounts from a 1970's Pontiac and the Z-shaped steel piece from a mid 1970's Chevy/GMC 2wd pickup that runs from the top of the frame to the front cross member. I also used the rubber lower mount that was already on the Chevy Steel piece. It fits the Pontiac upper u-shaped mount. Everything that I used was bolted in the two vehicles so no cutting or welding is required. Bolt everything to your Pontiac engine and lower it into the frame of the truck. Mark the frame rails and the cross member where the Z-shaped pieces sit and drill new mounting holes. I used a BOP Turbo 400 and everything cleared. You will have to move/change trans cross member. Good luck. If truck has PS use the pump and brackets from your engine. Stock exhaust manifolds fit fine. I don't know about headers.

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Old 10-14-2019, 11:47 PM
pokey1 pokey1 is offline
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we put a 400 Pontiac into a 58 chevy 2wd truck in the 70's... seems it went in pretty easily as I remember. Ran like a beast..

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Old 10-14-2019, 11:50 PM
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Swap candidate right here: https://forums.maxperformanceinc.com...d.php?t=817991

I have a friend who swapped well-built 462 into a ‘69 Chevy 3/4 ton long bed pickup, it was a nice fit and man did that truck ever move out.

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Old 10-15-2019, 01:36 AM
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My sister has a 455 in a ‘70 GMC and our dad is currently building a 428 to put in his ‘68 GMC. No real problem for either one. I posted these pics before. Not sure it ever got done by the factory though.

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Last edited by Ducks Goat; 10-15-2019 at 01:41 AM.
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Old 10-15-2019, 01:40 AM
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Assembly manual
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1999 WS6 Formula, 1 of 175
1967 GTO Linden Green 4 spd, A/C, survivor
1967 Lemans convt
1967 Firebird 400 bench seat, deluxe interior, auto
1965 GTO 462, KRE unported D-port heads, Bullet 234/244 cam, th400, tight 10" converter, 3.73 gears, 87 octane, 3440 lbs. empty,1.59 60ft, 7.159@95.33 (1/8), a real daily driver, been totaled, rolled 3 times, hit a tree airborne.
1961 Catalina 2 door htp
1960 Ventura 4 door htp wife's car
1960 B'ville 2 door htp
1960 Catalina Wagon wife's car too
  #8  
Old 10-15-2019, 06:26 AM
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Keith Seymore Keith Seymore is offline
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Quote:
Originally Posted by Ducks Goat View Post
My sister has a 455 in a ‘70 GMC and our dad is currently building a 428 to put in his ‘68 GMC. No real problem for either one. I posted these pics before. Not sure it ever got done by the factory though.
I knew you had the nice GTO but it sounds like you have a couple nice pickups too.



Quote:
Originally Posted by bober View Post
I'm curious about the possibility of installing a 462 in a truck ? I have a 462 going to dyno it next week and I would like to have a pick up . I don't have anything to put it in as of yet . JUST THINKING !!!
We had a friend back in the day that put one in a Jeep. That thing was a monster.

K

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  #9  
Old 10-15-2019, 06:49 AM
sdbob sdbob is offline
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I installed a 71 400 in my 74 2500 2 wd truck back in 80. Used frame mounts redrilled frame. Used longer battery cables,stock oil filter. Stock log manifolds, qjet,long tailshaft 65 turbo hydro with convertor out of 65 Cat. Cut driveshaft.used stock column shifter,needed adjusting as I couldnt manually get low. I dont remember radiator fan and hoses.Worked fine for my work truck everyday leaving in drive.World of difference hauling torque.

  #10  
Old 10-16-2019, 10:02 PM
bober bober is offline
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Thanks for all the info and please keep the info and any pics coming !!

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