[Gunter]

Originally Posted by Hotwatermusic

I have a 3.0 SC engine that the PO had modded to a 3.2. Aside from still having CIS, how different is this motor from the real 3.2's that came later, power-wise and reliability-wise? Is changing the 3.0 to a 3.2 "bad" for it any way; is it pushing it harder than it was designed for, etc.? Are there things I need to be careful off or watch out for more than a stock 3.0 SC engine?

Good stuff but we need to know more.

Find out from the PO what the compression ratio is for the P/C's.
And, what cams were used? 964 ?
Is this a '78-'79 engine or a '80-'83?
With SSI heater boxes and what muffler?

Common practice is/was to bolt on the larger P/C's but also to regrind the cams to a different profile like 964 with CIS. Installing SSI heaterboxes and a muffler with free-flow gives a few more horses. If your engine is a '80-'83, I'd recommend the use of the CIS and ignition distributor from a '78-'79 plus bore out the ports on the heads to match the larger intakes. If your engine is a '78-'79, no need to do that.

It is true that the short-stroke crank 70.4 mm likes to rev.
A noticeable kick comes in after 4000 RPM.
I kept CIS, 9.8 CR, 964-cams, SSI's..............and figure it adds about 30-35 HP.

Let us know more details.