Hey guys.
Do any of you guys know if a 4G63T Mass air can fit onto a 420A.

I've been told that my 420A is Speed density and if I want to change the cams etc. that I need to also switch to a Mass air.

I know of a mass air that I can get for nothing, and I'd like to know if I can use it for myself or if I should give it to someone on here who might need it.

Thanks guys.
Brian.