LS Swap with 4l60E Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fwayne · 05-05-2016, 03:36 PM

So I'm kicking around performing the swap of a 4.8 or 5.3 along with a 4l60E Into my '70 GMC. That combo is very inexpensive as a pullout. I'm tired of the relatively low performance and gas guzzling 45 year old 350.

I know its almost a direct fit in the engine bay with some clearancing for exhaust and motor mount adaptors. But does the 4L60E fit without floor pan mods? Currently I have a 350/th400 combo.

Other than a cam swap and tuning, I plan to keep everything as stock (referring to the donor) as possible for simplicity. Any other gotchyas or tips form those who have been there?

05-05-2016, 03:36 PM	#1
fwayne Registered User Join Date: Mar 2016 Location: Midlothian, TX Posts: 55	LS Swap with 4l60E Questions So I'm kicking around performing the swap of a 4.8 or 5.3 along with a 4l60E Into my '70 GMC. That combo is very inexpensive as a pullout. I'm tired of the relatively low performance and gas guzzling 45 year old 350. I know its almost a direct fit in the engine bay with some clearancing for exhaust and motor mount adaptors. But does the 4L60E fit without floor pan mods? Currently I have a 350/th400 combo. Other than a cam swap and tuning, I plan to keep everything as stock (referring to the donor) as possible for simplicity. Any other gotchyas or tips form those who have been there? __________________ 1970 GMC Stepside Short Gone...Factory 350 V8 Now...4.8L LS



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