318 running with low power - dyno

One thing that I don't care for is the intake and carb configuration.

You have a spread bore dual plane intake..

And a square bore carb...

With a 1" spacer....


What is the reason that you are using the spacer? Is it to shift the peak rpm or to adapt the mis-matched carb and intake?


I would either run a spread bore carb with that intake and a gasket with a center divider...

Or get the other Wiand intake that is spread bore.


You are using this one, which is rated from idle - 6000 RPM and spread bore, but have a square bore carb:

https://www.holley.com/products/intakes/dual_plane_manifolds/parts/8007

View attachment Wiand 8007 Action plus lg.jpg


I would use this one which is rated from idle - 6800 rpm and is square bore which will bolt directly to your carb.

https://www.holley.com/products/intakes/dual_plane_manifolds/parts/8022


View attachment Wiand 8022 Stealth lg.jpg


And to keep the strong dual plane intake signal all the way to the carb base, I would use a gasket with a split center similar to this one:

View attachment Carb Gask Holley 108-18 lg.jpg


Or an old Edelbrock LD340 would also work nice with your combo...