so i'm rebuilding my original 1970 340

@273
You get 22 mpg now, how much more can you possible get and what really $$$$ savings would that get you, what do you spend on gas a year now $500, $1000, $2000? even if you could save 10% on $2000 is only $200 a year. If you do a lot of Highway install an OD tranny but I wouldn't neuter the performance too much for a couple more mpg's.
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I DID GET 22mp with the engine that was stolen , now getting about 15 mpg with the 426 stroker in the car now getting expensive with 3 gallons of 110 octane with every 10 of piss .i just want something fun to drive , that revs quickly and gets good mpg . don't do much city driving mostly higway and back roads. f I want fast I'll put the stroker back in
this is just a project to see if it can be done and to keep busy. As for cam i think a mild roler with good amount of lift and not much duration should do fine , not impressed with lopey cams want good all around performance with max hp around 6200 - 6400