IMO, if you're gona be cutting into your frame and doing a BUNCH of fabbing, you might as well set your mind on something equally uncharted-> rear mounted engine.. hell Northstar V8, why not? wouldnt you like 32 valve DOHC v8 sexxx
not really... keep it simple and b series, if you have enough money to be that stupid, you have enough to build a strong B series or buy another car and youd be happier(miata v8 ftw)
He who dies with the most toys, wins.