It depends on what we're going for all out drag spec's or long life power. If you look at the dyno part that thing makes 304 lb-ft at 2400 rpm & never dropped below 290 from 2300 thru 4500 rpm. Build the bottom end super strong, mild porting, bigger valves, cam it for more low end torque, & limit rpm range to under 5000. Be neat to find factory TBI set-up from late 80's Mexico 292 to see what it's limitations are. Torque is what gets things going. That's one thing 6's got going for them. GMCpanel, What kind of fuel inj. you using?