Re: way off topic

From a Ford forum:

The quickest way to tell the difference is the spacing between the top two bellhousing bolts. 351C are 5inches on center. The 351M is closer to 7inches
or
If the distributor mounting hole is even with the front mounting surface of the intake manifold, then you have a 351C. If the mounting hole is deeper into the block, then it is a 351M. The front inner corners of the cylinder heads are also raised above the distributor hole on the M vs the C.
the 351m has a ridge that sticks out from the block on the front right next to the distributor

'C's were built in the US from model year 1970 to 1974(?), and 400s from 70-71(?) to around '78(?), and 351m's from around 75 to 81-82.
351 C...Built at the Cleveland engine plant, canted valve heads, bulletproof crank, bad stock oiling system, 4v heads have the largest ports of any factory small block, and valve sizes the same as a rectangle port 454 head, 2v heads, still some hefty valve sizes, make really good power if built right
351 M/400... the 400 came first, was designed as a low rpm torque motor, has more stroke than a 460, long rods for a good rod ratio, same engine design, but has taller deck height than a 351c, and not too many performance parts available, although alot of the 351 parts bolt on and in, and then when a smaller engine was needed for full size cars, the went with a shorter stroke crank, and voila', the 'Modified' 351(Note, if your engine is a modified, you will get laughed at and called silly names if you don't put a 400 crank and pistons in it, it runs that much better)

From: "neal zimmerman" <neal.zimmerman@xxxxxxxxx>
To: 1962to1965mopars@xxxxxxxxxxxxxxxx
Sent: Friday, September 7, 2012 8:57:45 PM
Subject: Re: way off topic

thank you.
neal

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