Alright, I’ve finally decided on the power adder. I’ve always wanted to do this. The 318 is getting boosted with an eBay turbo in a draw through configuration.
You've been doing research, so this is just an off the cuff thought.
It would seem like a (used?) Nitrous system, numerically high gears (1/8th mile race) and traction would be the best value for winning. Another factor is the nitrous can hit at the start, whereas the turbo has to build boost w/RPMs and how are you going to do that on the start line?
Nitrous (or whatever, you did say that "you always wanted to do the turbo)
MUST: gears and traction!