[Tim Walsh]

refugee,
First of all, what are you starting with as your base? I'm in the middle of a 2.4L rebuild right now out my old 2.4T. The 2.2 pistons will raise the compression ratio with the 2.4L crankshaft about a full point(I think) over the 2.2 compression.If you keep your Compression ratio under 10-9.8 you should be fine with 93 octane. I'm planning on using 2.2E pistons in my engine which should be about 9.5:1 CR, just fine for 93 octane.

The camshafts that you chose depend on what pistons your running. T pistons can only have T cams, E's can have T or E's. etc.

2.7 Pistons are something to consiter but they will require machining of your case and your case may or may not be strong enough for it.

The zeniths are ok carbs but the parts avilible for them aren't as pentiful as webers. If you can locate larger venturi's then you have a good chance of using them on your upgraded engine