Ok, so I know the stock 55mm MAF was choking down the engine since the TB was 60mm and had to breath thru that little 55mm hole. The MAF has been replaced with a C&L 73mm unit with proper sample tube for 19# injectors. Next question is, how much is the stock intake choking down the E7TE heads? I've read that they'll breath a lot better then the stock intake will allow them to, so how far can I upgrade the intake and TB before the heads become the choke point? Explorer intake, Edelbrock Performer, something else and how large of a TB can I go with before it's just wasted mm's. I'm thinking a 70mm would be about right with the proper intake or would a 65mm be all the stock E7's can handle even with an upgraded intake. Also, this engine is suppose to have a b303 installed in it(how can I verify that, can I measure the lift or something at the rocker and fine out?) so that should help breathing a bit. Anyway, what would a good set-up be to get the max. cfm out of the heads and 73mm MAF without breaking the bank? Thanks.