What do I need to do to put a bbc in my truck? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigbadchev72 · 05-03-2017, 10:15 PM

I have a 68' LWB that I Cut down to a SWB, it is a complete frame off. I lowered the rear 6" and swapped in an 81' chevy 2wd front cradle. I have 2.5" lowering spindles and 2" drop springs.

I was going to install a SBC with the 81' mounts and clamshell motor mounts. I just picked up a 454 that i am going to install instead. Will it work with what I have or do I need to get some different stands?

midniteblues · 05-04-2017, 12:22 PM

Bbc stands are practically a must for any kind of exhaust clearance.

I used the 68-71 stands with sbc pads and a huge washer on the bolt.

Plan out your exhaust and shifting assembles a head of time as these two cause the most problems with the swap if you don't have all the oe parts.

**kwmech** · 05-04-2017, 12:36 PM

Also, using the factory stands will push the transmission back about 1-1/2''. There is a different transmission anchor that bolts to the frame for the big block if you have an automatic. and of course the x-member gets moved also, but those holes are already drilled in the rails.

Doug's68SS · 05-04-2017, 12:40 PM

glad to hear you are going old school power!

**kwmech** · 05-04-2017, 12:45 PM

Quote:

Originally Posted by Doug's68SS

glad to hear you are going old school power!

I agree, I'm getting tired of everyone beating the LS drum. I'm in the process of putting a semi-pumped up 454 in my flatbed. I kept getting the same thing from my friends...........man you should put a 6.0 in it, nope, I want the low down torque

bigbadchev72 · 05-04-2017, 09:07 PM

The motor is currently on the engine stand, I have the machine shop doing up some semi closed chamber heads right now with some bigger valves and port work. I still have to find the time to blow apart the th350 and get the goodies put in it and I will be able to start mock up.

I feel like I have squirrel syndrome and jump from bodywork to engine work to working on my new mud truck to oh something shiney to what was I doing again?

I know the BBC engine stands are hard and spendy to come by. Are there any other options or work arounds?

05-03-2017, 10:15 PM	#1
bigbadchev72 People know me Join Date: Jun 2007 Location: Hermiston, oregon Posts: 840	What do I need to do to put a bbc in my truck? I have a 68' LWB that I Cut down to a SWB, it is a complete frame off. I lowered the rear 6" and swapped in an 81' chevy 2wd front cradle. I have 2.5" lowering spindles and 2" drop springs. I was going to install a SBC with the 81' mounts and clamshell motor mounts. I just picked up a 454 that i am going to install instead. Will it work with what I have or do I need to get some different stands? __________________ 1972 k/5 blazer CST 4X4 Crate 350, th350/205, dana44with trac-loc/14 bolt with detroit locker, 4 wheel discs 4.56s, 8" suspension lift using 73-87springs, 1" zerorate custom front crossmember, HAD CV drivelines and driveshaft e-brake, full cage, PRP seats, Full autometer gauges, 38x14.5x16 Toyo M/Ts, 16x10 Polished aluminum rockcrusher wheels 1967 longbox 4x4, Strong 400/400/208, 44/12bolt 4.10s, 6" lift, 35" Toyo M/Ts on corvette rally wheels

05-04-2017, 12:22 PM	#2
midniteblues Registered User Join Date: Jul 2011 Location: strausstown pa Posts: 3,394	Re: What do I need to do to put a bbc in my truck? Bbc stands are practically a must for any kind of exhaust clearance. I used the 68-71 stands with sbc pads and a huge washer on the bolt. Plan out your exhaust and shifting assembles a head of time as these two cause the most problems with the swap if you don't have all the oe parts. __________________ 81 camaro 355 4/spd 342 posi my first love. 67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover.

05-04-2017, 12:36 PM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,650	Re: What do I need to do to put a bbc in my truck? Also, using the factory stands will push the transmission back about 1-1/2''. There is a different transmission anchor that bolts to the frame for the big block if you have an automatic. and of course the x-member gets moved also, but those holes are already drilled in the rails.

05-04-2017, 12:40 PM	#4
Doug's68SS Registered User Join Date: May 2009 Location: Canton, Tx Posts: 175	Re: What do I need to do to put a bbc in my truck? glad to hear you are going old school power!

05-04-2017, 09:07 PM	#6
bigbadchev72 People know me Join Date: Jun 2007 Location: Hermiston, oregon Posts: 840	Re: What do I need to do to put a bbc in my truck? The motor is currently on the engine stand, I have the machine shop doing up some semi closed chamber heads right now with some bigger valves and port work. I still have to find the time to blow apart the th350 and get the goodies put in it and I will be able to start mock up. I feel like I have squirrel syndrome and jump from bodywork to engine work to working on my new mud truck to oh something shiney to what was I doing again? I know the BBC engine stands are hard and spendy to come by. Are there any other options or work arounds? __________________ 1972 k/5 blazer CST 4X4 Crate 350, th350/205, dana44with trac-loc/14 bolt with detroit locker, 4 wheel discs 4.56s, 8" suspension lift using 73-87springs, 1" zerorate custom front crossmember, HAD CV drivelines and driveshaft e-brake, full cage, PRP seats, Full autometer gauges, 38x14.5x16 Toyo M/Ts, 16x10 Polished aluminum rockcrusher wheels 1967 longbox 4x4, Strong 400/400/208, 44/12bolt 4.10s, 6" lift, 35" Toyo M/Ts on corvette rally wheels



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