THEracingLEGEND

hey guys, i wanted to swap out my stock spark plugs on my 1970 mustang. i have a modded 351w but im not too sure which plugs would give me the most power and fuel economy. i was thinking just using the E3 spark plugs, but i know you cant gap them so idk how that would effect my engine so any feed back on this subject would be awesome. Thanks guys

rmodel65

i always go with the standard autolite/motorcraft plugs... or the money youre gonna see you wont see an increase in mileage

THEracingLEGEND

i am also planning on swapping to a throttle boy efi system too

rmodel65

never head of throttle boy got a link?? personally id use factory 5.0 mustang stuff from a 1989-1993 car with a 351 intake

THEracingLEGEND

haha damn i messed up, i meant to say throttle body efi like the msd atomic efi or the new one from edelbrock

eZ

^ This