Automatic transmission options - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72k20410 · 07-15-2003, 09:10 PM

I am in the process of restoring a 72 k20 and have a few questions. It has had its enging and transmission rebuilt at some time but other than that it is completely stock. It has a 350 and AT with a 205 t/c. First question is what kind of trans came stock on a k20, was it a TH350 or TH400. The build sheet just says hydromatic trans with some kind of code. Does anyone have a list to decode the option? Second question, can I fit 35 inch BFGs on 8.25 rims with a 4 inch lift or will I have to cut the wheel wells?
Thanks

Here are some pics of the latest projects.

http://community.webshots.com/album/49140507zDjBsp

07-15-2003, 09:10 PM	#1
72k20410 Registered User Join Date: Jul 2003 Posts: 1	Automatic transmission options I am in the process of restoring a 72 k20 and have a few questions. It has had its enging and transmission rebuilt at some time but other than that it is completely stock. It has a 350 and AT with a 205 t/c. First question is what kind of trans came stock on a k20, was it a TH350 or TH400. The build sheet just says hydromatic trans with some kind of code. Does anyone have a list to decode the option? Second question, can I fit 35 inch BFGs on 8.25 rims with a 4 inch lift or will I have to cut the wheel wells? Thanks Here are some pics of the latest projects. http://community.webshots.com/album/49140507zDjBsp



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