Here is my question. I am a mid pack, low budget 1.6 SM driver. I have an older Rossini rebuilt motor, Fat Cats, Hoosiers and RR's (run both NASA & SCCA). I have no problem going back to RA1's, going to need new tires for 2016 anyway. The only issue is of retro fitting the stock shock hats and what do I do about my motor? Do we just de-tune to 113 and seal it, or do I need to look for a stock 1.6 head to refresh, or an entire junkyard motor?
Likely with the stock air box and spec exhaust you would need very little detuning too be sealed for ssm. Easily accomplished with either timing and or afr