64 L76 crank follow up

[Jack Beebe]

I guess the better question to ask is; whats the difference between the cranks? It appears that I have a press fit crank on a 365 hp motor.

[Duke W.]

Re: 64 L76 crank follow up

All 327 cranshafts are forged. Forged crankshafts have a relatively wide parting line compared to cast crankshafts, which is a primary ID feature.

SHP/FI cranks have Tufftride hardened journals and the front is drilled for a center bolt to hold the 8" balancer. If your crankshaft does not have this feature then it is likely not the correct crankshaft assuming that you are sure the engine is an original 365 HP version.

Duke

[RICHARD CHARLES]

Re: 64 L76 crank follow up

MY QUESTION IS IF YOU PUT A 8" BALANCER ON A NON DRILLED CRANK WITH PRESS FIT WILL IT HOLD ???????????????? RICK

[Clem Z.]

Re: 64 L76 crank follow up

unless there is a NCRS edict about the bolt i would have the crank drilled for one. i had the pleasure of seeing a damper come off of a 57 FI corvette back in the 50s and it makes a mess. not as bad as the flywheel coming apart but bad enought.

[Joe L.]

Re: 64 L76 crank follow up

Rick-----

The interference fits for balancers designed for use WITH crank snout bolts and those designed for use WITHOUT crank snout bolts are different. Using a balancer designed for use with a snout bolt on a crank without said bolt provisions is a prescription for losing a balancer at a most inopportune time.

ALL 8" balancers were designed for use with cranks with snout bolt provisions.

Some folks think that all 6" or 6-1/2" balancers are the same and are designed for use with cranks without snout bolt provisions. That's NOT the case, at all. Some 6" or 6-1/2" balancers are designed for use ONLY with cranks WITH snout bolt provisions. Using these on a crank without such provisions causes the "balancer-into-radiator" syndrome.

[Brian Monticello]

Re: 64 L76 crank follow up

I just had a shop drill and tap my crank - I think they charged me $40. Some have successfully done this with the engine (and crank) IN the car. Personally, I wouldn't try it.

Brian

[RICHARD CHARLES]

Re: 64 L76 crank follow up

THANKS FOR QUICK RESPONSE . IN THIS CASE I GUESS IT DRILL THE CRANK & NOT HAVE TO WORRY ABOUT IT .THANKS AGAIN ALL .......NCRS MEMBER