351C to 351M
#1
351C to 351M
I just picked up a 1974 Ranchero with a 351C 2v from the top it looks like a newer crate motor but after I got it up in the air the bottom looks like it has never been pulled it seems to run OK no smoke at start up or running it has a boat load of vacuum leaks it has a FMX trans that seems to be leaking every were but it shifts fine my question is I have a 78 351M crate motor with a edelbrock 600 performer carb & intake with a mild RV cam that I have put about 40K miles on in a F-150 its been my daily driver I want to swap motors is there any thing I need beside a bell housing for the FMX to fit the 351M will the motor mounts be the same and will the oil pans and pick up tubes be the same I guess I'm getting OLD I use to just pull it and try to see if it fits lol but its a lot easier now to ask now than do all that work Thanks Guys
#2
I have a 400 that was in the 78 F-150 that I was going to rebuild for a little bit more HP later on but right now I want it as my daily driver but I have been thinking about putting in a 5.4 and build it like the Lighting I got one of the supercharger's from one in a trade awhile back its been sitting on the shelf driving me nuts I have been trying to figure out how to put it on my 351M lol has anyone put a 5.4 in the 73 to 76 Ranchero ?
#3
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#5
Join Date: Feb 2002
Location: Greater Austin, Texas
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No way would I swap a 351C for a 351M! The 351M is larger, heavier and limited on performance parts...
#6
I am just trying to get it as my daily driver right now I seen a bell housing on craigslist for a 351M for the FMX so it just got me thinking about just using what I have to make it my daily driver I want to build the 400 that I have with after market heads I just don't have the funds to do it all at once being on a fixed income now that I am retired it's no fun it will at least get me back into a Ranchero I ordered a 73 Ranchero with a factory Drag Pack for my first car at 16 the dealer found me a R-code (Boss 351) that had been pulled off the line when someone backed out on it I sold it when I went into the Navy so now that I am retired I want to get back into a Ranchero this is me at 16 so I guess I will just pull the 351C and find out what I have to do to put the 351M it in at least until I get a really good motor to put back into it
#7
But I would like to try these new heads but I don't want to be looking for parts for the next month or longer
Thanks for any info
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#8
#9
I know I'm late to this party, but I call B.S on this. They're nothing alike. The Cleveland has a much lighter rotating assembly. And a shorter deck, thus much lighter. The 351M was then and still is a TURD. It's nothing more than a destroked 400 with HEAVY pistons that come far short of the deck at TDC. The only thing they share in common is the bore and stroke and the distributor. And a few other ancillary parts.
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