400m motor
 

can any one here help me i need to find out what year mymotor is i have all the casting numbers and serial number if any one nows how to do so please help the casting numbers are d7te-a3b and the serial number is 074152rm5 i would like to now the year and what truck or ccar this motor came out of thanks for the help rehgards mark

this engine is in a 1975 F250?

the engine would also be a 400. the 400's smaller brother is the 351M. the 400 doesn't have an M though since there is only one 400.

to help some the 351Ms and 400s were only put in trucks from 1977-1979 if I remember correctly.

Welcome to FTE

D7TE-A3B = 351M or 400 block casting ID number used 1977/79.

It could be a 351M or a 400.

Casting numbers on engine blocks cannot be decoded to determine the actual size of the engine.

The only way to know for sure is to measure the stroke.

351M = 3.50" / 400 = 4.00"

:-X25

i got the motor from a friend and put the motor into the 1975 the origanal was the 360 that i destroyed the cam shaft was in 14 pieces and 3 blown apart pistons and 3 snapped rods that is why the 400 is now in the truck ive heard that the 400 is a 400m because its the 351c block with bigger heads onit thats why its a 400m but im new to fords i always liked my chevys but i like the style of the old fords the serial number i gave would not determin any thing or what get back to me thanks regards mark

Ford never refered to the 400 as an M.

351M is the only engine that Ford used the M with.