Small Block Stroker ... Gas mileage?

Mopar M1 Single Plane
Hooker 1 5/8 comp headers
Comp Cams XR286HR-10 Hydraulic Roller

This is in a 1989 factory roller 360 truck block.

Incidentally, I think the ThermoQuad made the biggest difference. Super responsive bottom end, clean idle, great MPG, and actually cut 0.10 off the ET over the Holley 750DP.


Was it a DemonSizzler built Thermoquad??