Convert to one piece rear main to swap in a 6 speed? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rob68c10 · 08-23-2013, 09:29 PM

Hey guys I have a line on a bell housing, clutch, flywheel, pressure plate, and clutch fork out of a '90 corvette. The guy wants 500 bucks for it. Says the parts are good/like new.

My question deals with the rear main seal. The vette motor had a 1 piece rear main and I plan to run a '66 327. Can I convert to a one piece seal? Is there an easier option?

patdaly · 08-23-2013, 09:36 PM

A 90 6 speed would have been the old style unit, you can use a standard car flywheel and clutch, I don't think the bigger truck 14" flywheel will clear though.

When they changed to the LS series is when it became more difficult to swap.

**Ol Blue K20** · 08-23-2013, 10:04 PM

You won't be able to use the one piece rear main fly wheel but an older fly wheel will work
Posted via Mobile Device

mmiddle · 08-23-2013, 10:13 PM

The crank shaft is different on a "one-piece" rear main seal engine. There is no way unless you change cranks. You can have a special crank made by Lunati and some of the others to have a 327with a one piece seal.

**Ol Blue K20** · 08-23-2013, 10:42 PM

That's a lot a work though it would be easier to change to a old style flywheel and go
Posted via Mobile Device

08-23-2013, 09:29 PM	#1
Rob68c10 Registered User Join Date: Mar 2010 Location: Eastern Shore, Maryland Posts: 159	Convert to one piece rear main to swap in a 6 speed? Hey guys I have a line on a bell housing, clutch, flywheel, pressure plate, and clutch fork out of a '90 corvette. The guy wants 500 bucks for it. Says the parts are good/like new. My question deals with the rear main seal. The vette motor had a 1 piece rear main and I plan to run a '66 327. Can I convert to a one piece seal? Is there an easier option?

08-23-2013, 09:36 PM	#2
patdaly Registered User Join Date: Jul 2013 Location: Streator Illinois Posts: 61	Re: Convert to one piece rear main to swap in a 6 speed? A 90 6 speed would have been the old style unit, you can use a standard car flywheel and clutch, I don't think the bigger truck 14" flywheel will clear though. When they changed to the LS series is when it became more difficult to swap.

08-23-2013, 10:04 PM	#3
Ol Blue K20 Proprietor of Dale's Corner Join Date: Nov 2012 Location: Vacaville , CA Posts: 15,866	Re: Convert to one piece rear main to swap in a 6 speed? You won't be able to use the one piece rear main fly wheel but an older fly wheel will work Posted via Mobile Device __________________ "Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man

08-23-2013, 10:13 PM	#4
mmiddle Registered User Join Date: Jul 2013 Location: Forestburg, Texas Posts: 659	Re: Convert to one piece rear main to swap in a 6 speed? The crank shaft is different on a "one-piece" rear main seal engine. There is no way unless you change cranks. You can have a special crank made by Lunati and some of the others to have a 327with a one piece seal. __________________ Mark Jesus is the Way! 2003 2500HD CCLB Duramax/Ali (Clifford) 2014 2SS/RS black on black Camaro (Betty) 2006 Pontiac SOLSTICE silver/black (Lula-Bell) 1970 C/10 Short Wide (Peggy) 1964 C/10 Short Step (Hambone) RIP Jimmy Hamilton Thank you for the trucks

08-23-2013, 10:42 PM	#5
Ol Blue K20 Proprietor of Dale's Corner Join Date: Nov 2012 Location: Vacaville , CA Posts: 15,866	Re: Convert to one piece rear main to swap in a 6 speed? That's a lot a work though it would be easier to change to a old style flywheel and go Posted via Mobile Device __________________ "Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man



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