I sold my firebird, but I still have the crankshaft that came from the motor. The crankshaft is from my 68 Pontiac Firebird 400 motor, my motor ran super strong when it was in my firebird and I want that kind of power from my 69 Chevy Impala SBC 350. I am planning on an engine rebuild for my 350 within the next month or so and I want more power from my motor, I realized that I still had my crank from my Pontiac 400. I am guessing that this would add instant power as the crank is bigger, but Im not sure if this will work. Besides, I would have no use for the crank if I didnt ask to see if this would work first. Any suggestions or help would be appreciated. My 69 convertible Impala is pretty heavy, so I want a strong, more powerful, and more stout 350 upon rebuilding.
2007-03-06 20:06:16 · 7 answers · asked by Just Me 1 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
Early Pontiac motors are a completely different breed from Chevy's, nothing interchanges. You need to find a 400 Chevy crank and have it turned down to 350 main journals, this along with a .030" bore will produce a 383. Aftermarket 383 cranks are so cheap now that it's not really even worth the time and money to machine a cast iron 400 crank anymore. You can buy a cast steel Eagle or Scat for about $220.00. Cast steel is considerably stronger than cast iron.
2007-03-07 05:05:21 · answer #1 · answered by Anonymous · 1⤊ 0⤋
No, In 68 all Pontiac engines were made by or for Pontiac. Here's the deal. The 400 Pontiac was between the 389 which was in GTO and the 421 in the full size Catalina and Bonneville.The physical length of the Pontiac block is longer thus the crank and camshafts do not interchange. I think the cubic inch size 400 may be ringing a bell to you. Chevy built there's in mid 1975. for pick-up truck use only. They were a problem child of sorts because of block cracking between the siamesed cylinder bores and head cracking problem. Today everybody and there brother's are casting new and improved 400 inch chevy blocks, Dart and newly casted racing Chevrolet blocks can be safely be bored to 4 3/16 inches.
2007-03-10 17:06:47 · answer #2 · answered by Country Boy 7 · 0⤊ 0⤋
no
You can get a kit to build a stroker out of your 350 from about a gazillion places. A small block 400 crank machined and all the proper components will create a 375 that will kick some serious butt. A 400 small block with a 350 crank and some serious engine building produces a 383 that will run in front of the best. You can find it all in some publications like "How to hot rod a small block Chevy"
"Northern" is a mail order parts provider that I have used many times with great success, with very reasonable prices.
2007-03-06 21:57:59 · answer #3 · answered by Dalton K 3 · 2⤊ 0⤋
Pontiac 400 Crankshaft
2016-10-19 08:30:27 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Plain and simple No!... they are two different engines. your best bet is to just buy a stroker kit for your engine from some where like summit racing ( like some of the other guys here said)or sell your 350 and find a sb 400 to rebuild or a engine that's already redone in the size you want like from Summit or a Chevy Hi-performance crate engine.
2007-03-08 17:06:11 · answer #5 · answered by Krezkey 2 · 0⤊ 0⤋
well yes you can but you going to find the 400, crank to be different in the stroke,, now if you change the pistion rods, to fit the crank, it work,
2007-03-06 23:47:01 · answer #6 · answered by ghostwalker077 6 · 0⤊ 3⤋
I would say it's EXTREMELY unlikely. Two different motors.
2007-03-07 06:26:04 · answer #7 · answered by Trump 2020 7 · 0⤊ 1⤋