[rdane]

OK, let me add a bit more. I have two 915 trannies. One is a close ratio gear set up and the other stock. I have a turbo brake up grade in the works, as well as oil cooling projects. But I was thinking if I stay under 240hp or so I could stick with the CIS and go with a 3.5L/twin plug (no idea there was a 3.7) set up on the original block. Knowing almost nothing about this past reading threads and a couple of suggestions from my shop what other options do I have?

I didn't want the added problems of a 3.6.

This are along the lines I thinking about. Anyone else using something similar?

"As far as pistons and displacement, Arnold Wagner, one of the owners of Andial, had a 3.7 liter, twin-plug sc cis motor in his personal car. I found this out a few years back when talking to him about cis. While I was talking about its weaknesses, he was discounting them and praising the system. He apparently loved cis and applauded it for it's inherent simplicity, reliability and ability to easily pass emissions day after day. "