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Old 08-04-2002, 06:41 PM
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Post 400 or 400 or 396

I just blew up a 1980 chevy Z28 with a 13.2sec running 400small block setup turbo 350 and 4-10's in the rear. Now my next venture is a police impounded 77 transam firebird with a stock 400 big block, everything else stock too but in beautiful shape. Which of these motors is most suited for these F bodies BB's or SB's Should I stick with a big block in this moderately sized car or go back to smallblock power??? The car will be a weekend driver and ocassional trips to the drag strip. Dollar for power what do you think would be cheapest, so I can run 13's again? without having to rob a bank

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Old 08-04-2002, 08:05 PM
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I currently own a '77 with the stock poncho 400, keep it, build it, thats all that has to be said.

HK
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Old 08-04-2002, 08:34 PM
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Pontiac definatly makes a good motor, but I like the 400 small block better because its much lighter. The Pontiac has a 4.121 bore and a 3.75 stroke. The Small block 400 has a 4.125 bore and 3.75 stroke. So the small block 400 is actually a tiny bit bigger but with alot less weight. The only advantage pontiacs have is they come stock with bigger valves. The disadvange of pontiacs is they have huge combustion chambers, so you can't make as much horse power as the small block 400 unless you go out and order a set of edelbrock performer heads for it($1400 plus). The small block, you can find a good set of 2.02 valve 64cc chamber heads at a swap meet for a decent amount that will work great with a good size cam. Hope this helps a bit.
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Old 08-05-2002, 01:03 AM
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Well, you also can't approach the Pontiac like a small block chevy. different engines, take a bit of a different approach, in my experience.
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Old 08-05-2002, 10:32 AM
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It all depends How fast you want to go. I would say stick with the Goat unless you planning to hit the 11's. I succesfully run a 75 FireCHick, with a stock motor it ran in the 13.20's (fined tuned). Scored a set of older 670 Heads with 72 cc and now run 12.70's. Stock cam, pistons, 650 holley, perfomer intake, 2400 stall, 3.73 gears, slicks with No back seats and 1 bucket.
The Grunt in these motors are incredible and will be quite pleasurble at the stop lights as well. Only trouble is when you want to bring it up an notch quicker it is going to cost you plenty more.
When it comes to rebuild, or Bringing it up a notch further, Much beter idea to junk it and build a Big Block or 400, much more developed and readily availble cheaper parts out there. More Horsepower for Less Money is theKey!!
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