What NOT to do..............

[Chevyguy]

Some thoughts on runner length.

The stock 5.0 runners are VERY long. This helps torque production on a very oversquare motor ie 4.0" borex3.0" stroke. If I am not mistaken a typical carb 302 be it a Ford or Chevy likes tons of RPMs and does not have tremendous torque at low RPM's

Obviously you could never run fuel through a EFI 5.0 manifold it would certianly puddle out.

Without any actual data handy ( nice huh) I would imagine that the shortest EFI manifold runners ( victor JR?) is still longer than anything short of a tunnel ram for a carb motor, based on the upper vs lower manifold question.

So for EFI, shorter runner length loose torque gain airflow and higher rpm peak power.

For carb, gain runner length and also runner volume, gain airflow and peak power. But loose low rpm vac signal to the carb due to plenum volume.

The 8 butterflys probably is about the best setup, man that looks trick.

Ok my brain hurts now , gotta go