Actually, the 351-M is a 351. In the early 70's they built the 400 for the big passenger cars and trucks. Lots of torque in a low stress engine (low revs) In '78 they destroked it to a 351 by changing the grank and pistons. You can stroke a 351-M the same way. I did it last Summer. New stock 400 crank and stock pistons. Instant 400. Added a 2400 rpm torque convertor and it's one stump pullin 79 Bronco. AND. . . .compared to a Kenworth, it gets pretty good milage.
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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.
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