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05-10-2020, 01:26 AM
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#1 |
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Registered User
Join Date: Jan 2018
Location: TN
Posts: 259
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4x4 vs 2wd v8 engine position.
Does anyone know how much farther back a 4wd v8 is from a 2wd. My 69 2wd was originally a 250 i6 truck. It now has a 350 crate in it using the i6 mounts so it’s pushed back toward the firewall. I’ve been told this is the same position that 4wd trucks have their v8s. I’m installing a 700r4 so instead of cutting the driveshaft, I have a set of 2wd v8 mount I could install if the change is around 3 inches. I’ll just pull the engine and swap the mounts. It will give me an excuse to repaint the engine as well. Thanks fellas
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05-10-2020, 02:39 AM
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#2 |
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Registered User
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
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Re: 4x4 vs 2wd v8 engine position.
I believe that its 2"s.
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05-10-2020, 09:16 AM
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#3 |
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laying low
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,122
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Re: 4x4 vs 2wd v8 engine position.
The holes in the frame are already drilled for forward or rearward mounting. The V8 did mount in the rear set of holes for a 4 wd. The holes measure 2 5/8" apart.
__________________
Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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05-10-2020, 09:33 AM
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#4 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,715
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Re: 4x4 vs 2wd v8 engine position.
The 4x4 uses a completely different crossmember setup so it's not really an apples to apples. I will measure my 69 short step from hei cap to firewall and same on the Jimmy project. I would say it is more than 3".
Will see if that is correct or not!
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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05-10-2020, 12:09 PM
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#5 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,715
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Re: 4x4 vs 2wd v8 engine position.
On my two sample trucks, on the Jimmy, the top of the plug wires where the HEI retainer attaches are touching the firewall. On the C10 it is 4" from firewall to the plug boot.
Not the most precise way to measure but best I can do. Also a very small sample size of just one 4x4 and one 2x4 small V8 truck. YMMV.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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05-10-2020, 01:01 PM
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#6 |
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Registered User
Join Date: Jun 2018
Location: Munising,Mi
Posts: 360
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Re: 4x4 vs 2wd v8 engine position.
Well , I set my crate engine on the back set of holes and the dizzy was tight against the firewall . So I moved mine forward . I had to have a new drive shaft made no matter what , so For me it worked out and my dizzy is a whole lot easier to get at.
My truck is a K1500 GMC |
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05-10-2020, 09:15 AM
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#7 |
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Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 4x4 vs 2wd v8 engine position.
The original driveshaft might fit, mine did.
__________________
Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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