RE: Dual Carbs vs. Triple Carbs vs. Turbo Upgrade?
If you don't want and engine swap, then try nitrous oxide. A stock L24 should be able to handle about 75 hp NOS if it is in good condition. I once turbocharged a stock L26 that had a compression ratio of 8.8 to 1 and it easily handled 7psi. These motors are pretty strong and so NOS should be no problem. Good luck!!!