vortec 350 top end swap

[78gmc4by]

I've got a vortec 350 top end and almost complete wiring harness in my garage and was thinking about putting it on my 350 in my 78 with a 2 piece rear main block I was wondering if any of you guys might have some tips on the swap I know I'll probably have to run the vortec distributer and timing cover and run o2 sensors but I'm not sure on what all I may be overlooking

[Ziegelsteinfaust]

You'd likely have to disable much of the knock sensors, and such to run right.

I would use HP tuners they support the Vortec engines, and get a computer out of a Express van with the 047 code I think. It is a LS computer for 350 engines, and has the best tuning options.

[78gmc4by]

The knock sensor should thread into the drain hole on the side of the block that is where its located on my tahoe anyway

[Ziegelsteinfaust]

Then you should be fine. I never thought of such a swap, and I know a lot of details changed by the time vortec came around.

Just remember to use a cam similar to a fuel injected one as they like high vacuum.

[MalibuSSwagon]

Yes it's doable. However, you may need a tuner to calibrate the ECU program correctly, disable anti-theft, and other items. Look up LT1swap.com

[78gmc4by]

Ive got most of the parts to do it laying around and thought it would be different so why not and I have a shop within 15 miles that specializes in ls swaps and gm tunes who I'll probably bug with this swap