Chevrolet Nova Forum banner
41 - 43 of 43 Posts

·
Registered
Joined
·
7 Posts
thanks for the parts info, its ben driving me crazy trying to put this 396 in .its just not sitting on the frame stands, now i will be changing them but i havnt had an ishue with my th350 transmission not being close enough i dont understand wht i would have to get another cross member?
 

·
Premium Member
Joined
·
17,540 Posts
Discussion Starter · #42 ·
thanks for the parts info, its ben driving me crazy trying to put this 396 in .its just not sitting on the frame stands, now i will be changing them but i havnt had an ishue with my th350 transmission not being close enough i dont understand wht i would have to get another cross member?
BBC frame stands move the motor. If you do not also move the mounting point of the transmission you put a strain on the transmission case and it will break. Additionally you change the pinion angle so the drive shaft will vibrate. If you use the SBC motor mounts you do not have to change the transmission cross-member, but you will not get off the shelf headers to fit because they are made for a stock installation that used BBC frame stands and matching motor mounts. Hooker used to make a set of headers for a BBC in a Camaro sitting on SBC frame stands but it didn't work with P/S or A/C. When Garry Hooker sold his business to Holley, Holley dropped that set of tubes from their catalog.
 

·
Registered
Joined
·
1 Posts
Re: SBC to BBC conversion

Lots of great info. I made the swap last year on my 69 that originally came with a small block 350. Pulled the mouse out and dropped the rat in, a 454 big block. Everything went smooth as silk. I used the stock small block frame mounts, and also used moroso solid motor mounts for a small block. Didn't have to change out the heater box, car doesn't have ac as well. Bought cheap flowtech headers from summit racing. I'm running a turbo 350 tranny with a B&M holeshot 3000 converter. Ford 9" with 3.89 gears. Puts a grin on my face every time I drive it. This engine has a massive torque curve.
Did you use an HEI and did you have any clearance issues with your headers and power steering with those motor mounts?
 
41 - 43 of 43 Posts
Top