D4B DC mods like the LD340 DC mods?

go-fish said

I got one for a 383 but I guess it was the same as the 340 carb. I figured that and a Racer brown or E4. I hope to find a cam that will work with the pistons that are in it. That also depends on if I can get a thinner head gasket (MLS?) to bring the compression up that much more. I'm thinking this could be a good mpg engine, have a wide rpm range, and still be able to efficiently pass a semi with a 3.21 SG.

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i recently just did a little road trip in a 68 dart with a 273 2bbl and a no-grip rear end. zero-point-zero problems passing semi's, keeping up with traffic or tackling the mountain pass to get back home. all while clicking off high teens/low 20's mpg.

keep the cam small, keep the carb reasonable, bump the compression to a moderate amount and it'll be a ripper, have great street manners and return decent mileage.