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V · 01-28-2007, 08:45 PM

i typed this in the mornign but ran out quick and never posted it...so here it is now, lol.

first off, you need to make sure the crank and motor match up, as far as being a 1 piece rear main seal, or 2 piece. Obvioulsy a 70s 400 crank wont fit an 87+ block. Also, youd need an externally balanced dampener, if the crank isnt aftermarket and setup for int. balanced. stock 400s are ext. Same thing with the flywheel. if u ever want a T5 setup behind the motor, finding a 153t ext. balanced flywheel for a pre 87 motor is practically impossible. and like john said, some areas of the block may need to be clearenced. You may also want to look into aftermarket stroker cranks designed for 350 blocks, and not a true oem 400 crank.

01-28-2007, 08:45 PM	#7
V Stalker Join Date: Aug 2004 Posts: 12,082 iTrader: (12)	i typed this in the mornign but ran out quick and never posted it...so here it is now, lol. first off, you need to make sure the crank and motor match up, as far as being a 1 piece rear main seal, or 2 piece. Obvioulsy a 70s 400 crank wont fit an 87+ block. Also, youd need an externally balanced dampener, if the crank isnt aftermarket and setup for int. balanced. stock 400s are ext. Same thing with the flywheel. if u ever want a T5 setup behind the motor, finding a 153t ext. balanced flywheel for a pre 87 motor is practically impossible. and like john said, some areas of the block may need to be clearenced. You may also want to look into aftermarket stroker cranks designed for 350 blocks, and not a true oem 400 crank.