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MEDIK418 · 11-09-2002, 01:23 AM

A little more useless information on the 351-M. It started out as a 400-M and in an effort to produce a "smog motor" inexpensively for the larger generation Bronco in 1978, Ford decided to destroke it to a 351. It's a big block motor where the 351-C is a small block. (bellhousing bolt patterns) The 400 has the longest rods in the history of Ford engines, even longer than the 460. This makes it a VERY torquey motor way down low and this is a good thing since they really don't make good performance engines. . . .EXCEPT in big 4X4's. I have one in our 79 Bronco and for lazy power you can't beat one. Oiling isnt' a problem until you try for 8-9000 rpm on a continuous basis. FYI, all you have to do to make a 351_ into a 400 is swap out the crank and pistons. (I know because I just did it this Summer. . .cheap stroker)
One other thing, the Boss 302 was simply a 5.0 with Cleveland heads. Something you can do today with a half inch drill and a Clevor intake.

11-09-2002, 01:23 AM	#11
MEDIK418 Registered Member Join Date: Mar 1999 Location: Amarillo, Texas, USA Posts: 780	A little more useless information on the 351-M. It started out as a 400-M and in an effort to produce a "smog motor" inexpensively for the larger generation Bronco in 1978, Ford decided to destroke it to a 351. It's a big block motor where the 351-C is a small block. (bellhousing bolt patterns) The 400 has the longest rods in the history of Ford engines, even longer than the 460. This makes it a VERY torquey motor way down low and this is a good thing since they really don't make good performance engines. . . .EXCEPT in big 4X4's. I have one in our 79 Bronco and for lazy power you can't beat one. Oiling isnt' a problem until you try for 8-9000 rpm on a continuous basis. FYI, all you have to do to make a 351_ into a 400 is swap out the crank and pistons. (I know because I just did it this Summer. . .cheap stroker) One other thing, the Boss 302 was simply a 5.0 with Cleveland heads. Something you can do today with a half inch drill and a Clevor intake. __________________ 1986 four-eyed LX coupe, 358 Cleveland, Tremec TKO600/centerforce clutch, dish cut Probe forged pistons, comp cams hyd.roller cam, .579/.588@224/230, Edel.performer, 670 holley street avenger, CPR custom built long tubes, ported and polished 4bbl heads, manley valves, beehive springs, MSD peo-billet dist/MSD6AL, fluidamper, 5 lug conv. with 17x8 bullits there's more but it's still not finished yet. Oh, and the oldest boy is turning his 89 GT into a FFR cobra this next summer.