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Old 02-19-2016, 11:06 AM   #17
skyjgmc
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Join Date: Nov 2015
Location: Helena
Posts: 123
Re: 70' GMC "Walter"

So I guess I need to do a little more research before I start saying that I got an LS motor the motor in this van is just a standard 5.7 liter Vortec iron block motor, what sbc family is that considered??. It runs amazing, but the 4l80e may need a rebuild. I've been doing some research on using the 2wd 4l80e and making it a 4wd and bolting up my 205 to it since the speed sensor in in the transmission and then I won't have to worry about an aftermarket one, but still debating on keeping the sm420 since I want my kids to learn to drive a manual¿¿

Any insight on making the 4l80e 4wd?? is it as simple as removing the rear case and cutting the shaft down and bolting up the 205.or do I have to get a new main shaft?

Obligatory shot of the van I'm robbing the motor from:
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