when i rev the car in park or neutral, there is no problem....when i put it in drive and go down the road i have a studder in the low end andnot so bad when it gets in the higher rpms. It is really lacking power too. Also, after I drive it awile, it decides to cut off and is hell to get restarted because when it starts, I have to rev it high to keep it on cause if the rpms drop low it will cut off again.

Im thinking its the optispark. It could be the coil but im not very diagnostic on this problem. Trying to fix it without spending a whole lot diagnosing the problem cause Im builing a stroker fo the car on the engine stand.....lemme know what you guys think

 

I would say opti. I think shoebox has a way to check it on his website???
-b