Well, I'm really leaning at this point to run it as the RV 440 smog motor that it is before "building it". We'll see. Give me your honest ET guess if I do this .... Because I have no idea what a smogger RV 440 will run in a D150
Hard to tell, IQ52 got 309hp with M1 headers and a summit cam, so shouldn't even hit 300 hp with stock cam, that's got to be 40-60 hp less than you got now. Guessing mid/high 13's.