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351m or 400 question?

glw165

4
0
i have a 79 f150 4wd has a 400 in it that has rattling mains, i also have a 351m that is a good motor, took it out of this truck recently, truck needs a clutch so im pulling motor to change clutch, question is should i put back the known good 351m, or can i use the rod and main bearings from 351 in the 400?
 

Dirky

1,320
82
glw165 said:
i have a 79 f150 4wd has a 400 in it that has rattling mains, i also have a 351m that is a good motor, took it out of this truck recently, truck needs a clutch so im pulling motor to change clutch, question is should i put back the known good 351m, or can i use the rod and main bearings from 351 in the 400?
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The bearings will fit, assuming the journals have not been ground. If you did swap bearings, they would be shot in another 1000 miles, due to the fact that used bearings have already seated on different journals. Definitely a big no-no. Swap the 351M back in or rebuild the 400
 
LEB Ben

LEB Ben

Arrogant A-hole At-Large
34,919
1,124
outside your house
powerstroke said:
My '78 ford F250 has a seized distributor. Does anyone have any suggestions on how to get it unstuck?
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Soak it with penetrating oil every time you pass by for a few days and work it with a pipe wrench after a few days. Apply heat to the block as you're working the pipe wrench. Work the dizzy with an off the shelf super cooler at the same time. Give the dizzy shaft a smack with a dead blow intermittently.
 
BuzzGun79

BuzzGun79

Nov.TOTM 2012 / 2012 TOTY
2,388
55
If your short on time...heat the block,this will help disolve the built up tarnish on the shaft..then use a slide hammer to pull it out...
 

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