198 vs. 225 revisited

It is possible to get 30 mpg with a slant six, "A" body. There are several on this site and ss.org that get very close. I have a 64 Valiant in my yard with a 170 and 3 speed std trans, that gets upper 20's. I think It will break 30, when I install a A833OD in place of the 3sp. The motor is .060 over honed with a block plate, deck cut to .005 deck hight, balanced, Good valve job and head cut to give an honest 9.5 CR (don't remember the cc's). Small Mopar performance cam (244 lift). Holley 1920 carb on a stock intake, stock exhaust manifold, with a low restriction exhaust system.

PS: I also have a 86 Toyota PU, that gets 18-19 MPG towing my 5500 lb race car trailer. 371,500 miles on the 22RE engine and never had the head off. Just two timing sets.