how to tell a 351c from a 351M?????
#1
#3
The two have different bellhousing bolt patterns. The C has the small block pattern and the M has the 385 series pattern. I don't know how far apart the holes should be on each, but it is an easily measureable amount. IIRC, the M also has a significantly taller deck height which would make the intake manifolds different widths.
#4
He was asking about a 351C and M not a 351W.
To tell the difference:
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.
Looking at the block at the base of the distributor the 351C will be even with the bottom of the intake manifold. With a 351M/400 there will be a ~1" high lip up to the bottom of the intake manifold.
To tell the difference:
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.
Looking at the block at the base of the distributor the 351C will be even with the bottom of the intake manifold. With a 351M/400 there will be a ~1" high lip up to the bottom of the intake manifold.
#7
Trending Topics
#8
Originally Posted by Torque1st
To tell the difference:
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.
#11
#12
351C vs 351M - look for a cast "fin" next to the distributor, most of the 351M/400 engines have that. Look at where the heads meet the block deck - 351M/400 deck is about 1" above the timing cover, 351C sits right on it. Look at the motor mounts if you can - 351C uses a similar mount to a 289/302/351W, 351M/400 mounts bolt to the side of the block using three bolts. As mentioned, the 351M/400 has a big (same as 385 series) bellhousing pattern. 351C has bell same as 289/302/351W.
Thread
Thread Starter
Forum
Replies
Last Post
gettler
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
46
12-16-2019 02:51 PM
Bob Crain
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
46
11-14-2012 07:00 PM