OK I am looking for a lightning or gt40 intake for my 92 F150 351w. So can someone school me on what vehicles I can pull one off of and will I need the upper and lower? Can some one learn me something on this topic? How much power can be had from putting this intake on? Also how much power can be had from swapping out my heads for gt 40 heads also? thx

 

You can find both on gen1 lightning. It's hard to say exact gains, but maybe 30 hp from the heads and intake. Stock 5.8 I believe was 215 hp and lightning was 240 hp with the above.