Tomorrow evening I'm going to look at a 350 block from a 1991 Silverado. Comes with pistons, water pump, power steering pump, oil pan, timing chain cover, camshaft, a couple other pullies and a few more things.

I have the 305 TPI from my '86 Iroc-Z28.

Here's my questions:

Can I use the heads from the 305 on this 350?
Can I use the tuned port setup on this block then?
What ECM will I need?

I'll be reading through the stickies here to find more information out in the mean time, but any answers and advice are appreciated.

 

You use all your existing TPI intake , wiring and computer ;
just need a same year 350 prom for the computer and 350 knock sensor to replace your 305 one
Need larger 350 injectors

Your heads will bolt up to the 350 shortblock fine but someone who knows more about 305's than me ( never owned one )
will tell you if they will work on a 350.
Things like the CR ( too high or too low ) come into play when swapping heads