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I have a 1977 F-250 with a 400M in it.. And it does not have a dipstick.. And i cant seem to find one anywhere.. Does anybody know where i might be able to get one at.. Also somebody told me that all big blocks have the same dipstick and that i could use one off a 460.. Does anybody know if this is true or not?
According to the tech article on this site about 351M/400 performance upgrades, as well as the very site you linked, the 351M came out in 1975, for cars first; then placed in trucks starting in 1977 (as well as the 400).
Ok on to the dipstick issue. The 4x4's had the dipstick in the oil pan and the 2wds had it in the front of the motor kinda by the thermostat housing. If someone put a 4x4 motor in a 2wd and changed out the oil pan you would lose the dipstick. BUT there is a knockout in the block where you could install a 2wd dipstick.