the LO5 in my 93 caprice needs moroe power. most blame the heads for the poor top end power as they are a small port. i'd like to do the multi port conversion to it but my brother says for the power gains you can add 100 shot of blue bottle for half the price and easier to add and can be swapped easier. my roommate says swap to a carb and do a more powerful cam. I currently get 15 mpg in a 4k land yacht. to me the gas pedal is either on or off,LOL any input would help?