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SBC into 1992 4.3 G20 #754853
December 11th 2019 10:01 pm
December 11th 2019 10:01 pm
Joined: Oct 2019
Posts: 3
South Florida
H
harleydstone Offline OP
stranger
harleydstone  Offline OP
stranger
H
Joined: Oct 2019
Posts: 3
South Florida
Hey guys, I've got a 1992 G20 with a tired ol 4.3 in it, and I believe a 700r4. Will a 350 bolt up to existing tranny and motor mounts? I have a good running 350/th400 in my '66 pickup that I'm pulling to do LS swap. Would I be better off using the th400? I'd really like to keep the overdrive for mileage. I also considered leaving my truck alone and putting the LS/4l60e in the van, but I haven't seen many LS swaps, and feel like the 350 would be pretty easy swap and have me back daily driving the van in a weekend. Thanks for any input!

Re: SBC into 1992 4.3 G20 [Re: harleydstone] #754855
December 11th 2019 10:11 pm
December 11th 2019 10:11 pm
Joined: Oct 2019
Posts: 3
South Florida
H
harleydstone Offline OP
stranger
harleydstone  Offline OP
stranger
H
Joined: Oct 2019
Posts: 3
South Florida
Pic of the two.

Attached Files 20191007_191226.jpg
Last edited by harleydstone; December 11th 2019 10:13 pm.
Re: SBC into 1992 4.3 G20 [Re: harleydstone] #754856
December 11th 2019 10:38 pm
December 11th 2019 10:38 pm
Joined: Feb 2016
Posts: 590
Portland, OR
Deathorvictory Offline
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Deathorvictory  Offline
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Joined: Feb 2016
Posts: 590
Portland, OR
Quick and dirty is the 350/700r4 trans combo. You’ll need new motor mounts for the bigger 8 cylinder block but it will work fine with the 700r4. Your van already has the crossmember for it and will give you OD. LS swap would be cool, there are a few folks in here who’ve done it but is a lot of work and depends on what you want out of the van. Check the readers rides section and you’ll find some examples.

I’d leave the LS for the truck personally as that would be fantastic to drive with a modern drivetrain and worth more in the end.


1979 Dodge B200 Shorty, 1987 B250 Longy
Re: SBC into 1992 4.3 G20 [Re: Deathorvictory] #754857
December 11th 2019 10:47 pm
December 11th 2019 10:47 pm
Joined: Oct 2019
Posts: 3
South Florida
H
harleydstone Offline OP
stranger
harleydstone  Offline OP
stranger
H
Joined: Oct 2019
Posts: 3
South Florida
Thanks, that's the answer I was looking for. If I buy "stock" G20 V8 motor mounts, they will position the engine correctly for the 700r4's current position?

Re: SBC into 1992 4.3 G20 [Re: harleydstone] #754861
December 12th 2019 11:16 am
December 12th 2019 11:16 am
Joined: Feb 2016
Posts: 590
Portland, OR
Deathorvictory Offline
addict
Deathorvictory  Offline
addict
Joined: Feb 2016
Posts: 590
Portland, OR
Trans stays in the same place. It has a cross member and trans mount that’s all OEM and they did both motors with those transmissions. You can keep the trans, driveline, etc..

That being said, 92 is all fuel injection so it won’t be a direct drop in. You’ll have to keep all the functioning ignition, carb, vacuum lines, etc all that is making your 66 go down the road. Connections like oil pressure and engine temp may have be to figured out, not sure if all that is the same.


1979 Dodge B200 Shorty, 1987 B250 Longy
Re: SBC into 1992 4.3 G20 [Re: harleydstone] #754863
December 12th 2019 11:49 am
December 12th 2019 11:49 am
Joined: Jun 2010
Posts: 14,619
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 14,619
Van Diego California
Hey Harley you can fit a 454 with a 4L60E in there if you want to … a 350 no problems


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: SBC into 1992 4.3 G20 [Re: harleydstone] #754942
December 15th 2019 11:42 pm
December 15th 2019 11:42 pm
Joined: Sep 2017
Posts: 61
MN
JAGI410 Offline
journeyman
JAGI410  Offline
journeyman
Joined: Sep 2017
Posts: 61
MN
LS/4L60E is my vote!

Either way you go, the engine mounts are the same, but it's the mount towers that you'll need and these are tough to get. Expect some junkyard trips for find the V8 towers.

Last edited by JAGI410; December 15th 2019 11:43 pm.

Jason
1984 Chevy G20 5.3L/4L60E

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