Well i have made some progress by convincing a friend it would be a fun project with easier to get parts than his current race car. Since im trying to cover all of my bases before hand it would be nice if i can get some answers for these questions.

"What are the main differences between all of the Silver Crown cars? What is so different about the 06-07 cars?

What kind of distance is there from the crank flange to rear end joint?"

The idea is to make the car symmetrical(im assuming mostly changing lengths of suspension pieces and rear end), Install a gforce 4 speed with shorter drive shaft, and other ancillary parts to get everything to work. I have only helped out a friend race his midget so im a little ignorant to these cars and am assuming alot is the same just larger and beefier.

Thanks!