I use to be just into the straight line racing but since my last car 91 bmw I have focused on cornering. I dont want to do the 350 drop. A newer I6 thats fuel injected would make it alot easier to get to the 250hp area. You dont have to have alot of power to go around corners but you can get to that next corner faster with more power. I have been very busy lately and im still doing research and what to do I may stay with the factory engine I dont know.