'60s 427 FE 425 Hp side oiler......mpg?

[patrickt]

Originally Posted by AC Ventura

Do we think MSD Atomic or similar EFI would make any difference?

No. The only way to increase MPG is to put her on a flatbed.

[Young1]

428, top loader, 9.5 CR, 3.31 diff. Did 200 miles today between 65 and 80 mph, 11.5 mpg, 750 holley vac secondaries, 72 primary jets

[DanEC]

GTOs, 427 Corvettes, 383/440 Plymouths, my FE ERA - I've never had anything that got over 13 mpg on the highway - 8 - 10 mpg in town. Only after EFI and high rear ends/overdrive transmission started being installed did I see anything over this. And then the exception is my 2003 Lightning PU with overdriven supercharger and computer tune - gets about 10 - 12 mpg.

[Ron61]

On a good day with my 1964 SO I could get right at 12.8 MPG. My best with the 1969 Cobra was 13.2 once and most of the time it is about 11.5/12.6 and if I get on it the mileage drops to around 9.

Ron