Boss Mustang stocker

[goinbroke2]

Originally Posted by FireSale

For once, the guide is correct on the rod lengths. The 351M had a de-stroked crank and pistons with a taller compression height to bring the cid down to 351. It was built until 1982 and was Ford's last pushrod production engine.

According to the guide the 1970 BOSS 302 had 5.090 rods, Same as the regular 302. It's not perfect.

Disclaimer: I'm no expert, just a good researcher.

This is Bill's build thread. I'm going to leave it to him as the owner. I'm talking too much...

Dale

Actually my point is that the guide is wrong. The 351C has a 5.78 rod length, the 351M and 400 both have 6.58" rods.
Deck height on a 351C is 9.206, the 351M and 400 are 10.297"
To put it bluntly, you cannot use 351C rods in a 351M.
Pull the crank and pistons out of a 400 and put in 351M crank and pistons and you now have a 351M, everything is the same except crank and pistons.

So, why has this never been picked up? I'll assume it's because nobody has ran a 351M in anything. Although I do remember a mid 70's green wagon but I'm sure it was running a 400. (jolly green giant maybe?) Regardless there's no replacement rod for the 400 (or 351M)