I swapped in a Goodwrench crate motor (rated at 220 HP stock) and put my LO3 TBI setup on it. I'm pretty sure the TBI is holding me back (not because it's TBI, calm down TBI guys) but because of the 305 computer......As far as mods for HP, I have an open element, K&N filter, Headers, no cat, flowmaster, hypertech chip, TB throttle bore removed, crank underdrive pulley, MSD wires, and lots cooling mods, and on the gtech i only have 230 HP.....and I know all those mods are worth more than 10HP over the motors 220HP stock rating.....this is why i think the TBI is holding me back. do i need to swap TPI onto it, or do I have any other options? DON'T WANNA GO CARB.

 

I don't think you need to go TPI...I think with the 350 TBI truck injectors and some prom tuning, you could free up some more power.

The TPI setup won't yeild much more HP, but would give you some more torque, that's for sure...but it may not satisfy you for the $$ and time spent.