In this case, install a transaxle from a Porsche Boxter with a close ratio 6 speeds kit matched with your Honda engine. It is not that hard to do an adapter plate between motor and transmission. The more difficult is to build the clutch from the Honda to suit the depth of the Porsche bellhoosing. For the clutch disc, you just need to take the Honda, remove the hub and install a modified hib from the Porsche. My brother and I did it for his Duratec engine matched with the Porsche transaxle.
If you have a very clore ratio 6 speeds, your hp will be great with or without torque at low rpm. If you can find a ratio between the first and the sixth of 2.5 or less, it should be great. Only for that, with body and frame modif, it will cost more than 20k for sure (time: 12k, exhaust: 1.5k, gearbox: 2k, gearset: 5k + extra). But the weight will be similar with more weight to the front, your actual suspension should work.
Elise 2006, white, BOE REV400/EFI, 310+ whp, K20 coming
List of mod: I am just stupid putting that much money on that car!