SB to BB swap ????'s - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RED67 · 04-02-2003, 08:45 AM

i"ve been reading some posts on if you move the motor back to the 6 cylinder location it will help w/traction & handling....does this also apply for a BB ???does anyone have any pics of there frame w/BB mounts in them ???what about distributor clearance,valve cover clearance????anyone have any suggestions,tips,tricks,do's & dont's....i will be dropping the beast in this weekend(with professional help)so any suggestion or comments are welcome....thx RED67

crazy longhorn · 04-02-2003, 09:10 AM

I am running my sb in I 6 position, but Im not sure that the BB heads will clear the firewall in that position. The BB mounts do position slightly rearward as compaired to the sb......but not as far back as it would be in I6 position. IMO, on a BB swap you will probably have less headaches if you use the mounts/stands for the BB. Good luck,crazyL

RED67 · 04-02-2003, 09:45 AM

i will be using the 68-71 towers & mounts...i had to take out a loan for those damn towers($72 a peice)so for the mounts & towers I will have a little over $200 in them.....ouch

RED67 · 04-03-2003, 08:42 AM

ttt

GreenMystChevy · 04-03-2003, 02:33 PM

Try getting a hold of "Orence1" and see if there is anything that he can help you with. He is just about done with this process.
I do know that the big block sits back further than the small block when you use the big block motor mounts. We had to take the drive shaft in and get it shortened. The drive shaft place recommended using small block mounts to keep it the same, not sure about that one.
I do know that it fits fine in the big block position but I don't think it would fit at all any further back. Those heads would hit the firewall. That is all that I can think of for now. Good luck.

04-02-2003, 08:45 AM	#1
RED67 Forever Grateful Join Date: Mar 2001 Location: Forney,Texas Posts: 777	SB to BB swap ????'s i"ve been reading some posts on if you move the motor back to the 6 cylinder location it will help w/traction & handling....does this also apply for a BB ???does anyone have any pics of there frame w/BB mounts in them ???what about distributor clearance,valve cover clearance????anyone have any suggestions,tips,tricks,do's & dont's....i will be dropping the beast in this weekend(with professional help)so any suggestion or comments are welcome....thx RED67 __________________ R.I.P Dad 04-07-42 - 05-27-09

04-02-2003, 09:45 AM	#3
RED67 Forever Grateful Join Date: Mar 2001 Location: Forney,Texas Posts: 777	i will be using the 68-71 towers & mounts...i had to take out a loan for those damn towers($72 a peice)so for the mounts & towers I will have a little over $200 in them.....ouch __________________ R.I.P Dad 04-07-42 - 05-27-09

04-03-2003, 08:42 AM	#4
RED67 Forever Grateful Join Date: Mar 2001 Location: Forney,Texas Posts: 777	ttt __________________ R.I.P Dad 04-07-42 - 05-27-09

04-03-2003, 02:33 PM	#5
GreenMystChevy Registered User Join Date: Jan 2002 Location: Woodinville, WA Posts: 513	Try getting a hold of "Orence1" and see if there is anything that he can help you with. He is just about done with this process. I do know that the big block sits back further than the small block when you use the big block motor mounts. We had to take the drive shaft in and get it shortened. The drive shaft place recommended using small block mounts to keep it the same, not sure about that one. I do know that it fits fine in the big block position but I don't think it would fit at all any further back. Those heads would hit the firewall. That is all that I can think of for now. Good luck. __________________ Jeremy '71 C-10 '72 GMC K2500 '72 Nova (Dad's) '70 Chevelle SS '55 Sedan Delivery Attempting to build up this here 4x4...make her real tall and purty...well, maybe just tall

04-02-2003, 09:10 AM	#2
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	I am running my sb in I 6 position, but Im not sure that the BB heads will clear the firewall in that position. The BB mounts do position slightly rearward as compaired to the sb......but not as far back as it would be in I6 position. IMO, on a BB swap you will probably have less headaches if you use the mounts/stands for the BB. Good luck,crazyL



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