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Low compression on the 360 when compared to the 340's is the culprit.





Yeah... whole different animal, thats why i didn't even mention the 340. Plus... junk heads, no roller cam, and i'm not paying a 340 premium.

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I have a 360 with 9.5:1 and a 750 3310 Holley. It's as efficent as you're gonna get in a 5,600 lbs. Powerwagon with full time 4wd. It does get better mileage than the 318 2 bbl. it replaced.

11 mpg average for the 360 and 9 mpg average for the 318 with LOTS more grunt and towing capability.




Well, at 5600lbs i guess so. Thats WAY too much haul for a 318.

With a CR comparable to a 68-70 340 though, i'd love to see them both in a car and see what happens....