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Those intakes seem to work great. Like a dumb ass, I HAD one and left it on a 73 Challenger I sold a few years back.



this is what I have been reading here on moparts.

thought I would scratch one up and play with it.

the q-jet on the RPM intake is getting 15 MPG if i keep the RPM right at 2000 or below on the highway. = about 50 MPH

going to run a 2.76 gear next. by the math is should raise the ground speed up to 55-60 MPH thus droping engine speed down to 1850 RPM at the sweet spot.

then I plan to swap only the intake to see which one nets the most gain on MPG on my stock lopo 440.

I am surprized the high rise RPM intake does this well on MPG using open adaptor/q-jet carb on it. the edelbrock 600 was good but 4-5 MPG less with it.