engine identification
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Freshman User
Joined: Mar 2004
Posts: 29
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From: Idaho
engine identification
I have just picked up a 78 F-100 the guy that i bought it from said that it had a 302 in it. I don't think that this is true. I think that it is a 335 series. a 351m or 400. what is the most noticable diference between a 302 and 351m or 400?
Senior User
Joined: Aug 2003
Posts: 304
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From: Billings, Montana
uh, look on the valve cover...or on one of the edges of the heads, if its a 351M/400 itll have an M cast into the head or you can always post the VIN and someone will decipher it....check the door jamb for that...
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Engine Identification (rev):
======================
351C/M/400 335 series: 8 bolts in rectangular valve covers. Timing chain housing is part of block. Thermostat housing on block. Exhaust bolt holes diagonal.
351M/400 335 series: intake is 12.7" wide the 351C is narrow.
351W/302/5.0L 6 bolts on trapezoidal valve covers. Thermostat housing on intake. Exhaust bolt holes horizontal.
429/460 385 series: 7 bolts in rectangular valve cover
352/360/390/427/428 FE series: Intake goes under valve covers.
-There are other indicators but these are enough to distinguish engine families.
======================
351C/M/400 335 series: 8 bolts in rectangular valve covers. Timing chain housing is part of block. Thermostat housing on block. Exhaust bolt holes diagonal.
351M/400 335 series: intake is 12.7" wide the 351C is narrow.
351W/302/5.0L 6 bolts on trapezoidal valve covers. Thermostat housing on intake. Exhaust bolt holes horizontal.
429/460 385 series: 7 bolts in rectangular valve cover
352/360/390/427/428 FE series: Intake goes under valve covers.
-There are other indicators but these are enough to distinguish engine families.
Posting Guru
Joined: Apr 2003
Posts: 1,903
Likes: 2
From: Wyoming
Thanks for the good info, Torque1st. I was just looking at a '71 Mustang Mach 1 - all the numbers check out as a 4V-351C, but the owner says she had to replace a cracked block. Made me wonder if something else was put in the engine bay.
