I recently did an engine swap. Used a 400 block bored .040 over (409?) and my stock 89 heads and intake. I've got the bottom end taken care of, but am looking at ways to open up the intake without the big expense of a TPI or MPI setup. The specs on those Holleys say they flow like 20% better than a stock TBI and they cost about the same as a new carb (around $370). Was wondering if anyone had good or bad experiences with them. Also considered the 4 injector model but then have to change the manifold and more and for that price I'm pretty close to a nice aftermarket MPI setup. I probably need a reprogrammed chip too but want to get everything else finished first. Hmm, what to do, what to do?