aftermarket MPFI conversion kits any good?

dont bother with TBI, its like a carb with injectors in it... still have fuel puddling and all the other stuff...

if you gonna spend to the $$ go with a Sequential (fires the injector when the cyl needs fuel) vs. batch fire where it fires all injectors on one bank, then the other...

also make sure what ever you by has a closed loop system, this allows the system to learn and adjust on the go with out having to mess with it...