I am tired of beating on my e36 m3 on the track. I would like to get a car just for track events solo and some nasa, bmw cca races. I don't know which way to go, shoud I buy a 325 and do the motor and build a race car or should I go with an e 30 m3, I do have a budget. E30's are more expensive for parts and other things but is it worth it ?. How does that high reving 4 cylinder compare to a built up 325 with 2.7 diesel crank ?. Which car will I have more fun on the track with? I want something reliable. I need advice any will be much appreciated.