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04-12-2020, 10:56 PM
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#1 |
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BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,791
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Big block air vs small block air
If you are removing a big block from a truck with factory air and installing a small block in its place with all of the small block factory air brackets is there anything about the way a big block is set up that would need to be changed besides the obvious brackets?
Hope that made sense =)
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04-12-2020, 11:23 PM
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#2 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: Big block air vs small block air
Not that I'm a wear of. Everything is the same except motor brackets as you know already.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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04-13-2020, 12:30 AM
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#3 |
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Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,581
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Re: Big block air vs small block air
Aside from a possible difference in AC hoses, be sure the radiator and shroud are for a big block with air...
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04-13-2020, 09:15 PM
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#4 |
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BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,791
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Re: Big block air vs small block air
Since the truck is already a big block with air it does have the radiator and shroud it came with. Are you saying those parts will need to be changed when installing a small block?
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04-13-2020, 09:25 PM
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#5 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: Big block air vs small block air
Some times yes they will need to be changed depending on where you locate the motor when you install it.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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04-14-2020, 12:10 AM
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#6 | |
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Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,581
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Re: Big block air vs small block air
Quote:
Hopefully you've already taken care of the obvious items -- fan shroud, motor mounts and frame brackets, etc.. The radiator should work just fine with a SBC Radiators can't be too big provided the shroud fits, but they can be too small.. BBC and SBC compressor brackets won't interchange and the AC hoses may or may not work, I'm guessing they will provided the compressor mounts on the same side of either engine. You should be ok with everything else... |
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04-14-2020, 01:23 PM
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#7 |
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BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,791
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Re: Big block air vs small block air
Ive been tossing and selling a lot of stuff and I was just making sure I didn't toss or sell something I wish I would have kept ... Thanks for the info fellas
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05-04-2020, 08:09 PM
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#8 |
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Senior Member
 
Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: Big block air vs small block air
Is the bbc long water pump going on the sbc? To ensure all pulleys line up?
__________________
Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks 
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05-04-2020, 08:20 PM
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#9 |
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Senior Member
Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: Big block air vs small block air
actually belay my last (as we say in the navy) after reading more threads i just learned that 67 72 bbc all had short water pumps. I learn something new everyday
__________________
Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks
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