Try using higher octane gasoline 93 up. (racing fuel a plus) going on bottle refill 20 and still running strong. Colder plugs are good. Also check your distributor for how advance it is. If its advanced too much your gonna blow something. I change cap, rotor, and plugs after every bottle cause they tend to go bad. (better to be safe than sorry)

nology wires
ngk iridium plugs
dc headers
hks catback
nitrous express (75 wet)
bottle heater
injen cold air intake