351M bolt patttern

Xrigid18X · #1 (**permalink**) 11-04-2009, 10:23 PM

Does the 351M have a big block bolt pattern or the small block? reason for asking is there is one for sale in my area and I want to put it in my f150 with the m5r2.

Thanks in advance!

85e150six4mtod · #2 (**permalink**) 11-05-2009, 01:26 AM

It has the 385 big block pattern--370/429/460. No M5R2s in that pattern afaik. ZF trans yes, but not the Mazda box.

You replacing another 351M?

Xrigid18X · #3 (**permalink**) 11-05-2009, 10:11 AM

No I am replacing my 300 six with a V8 and found a 351M for sale on craigslist and wasn't sure if it would bolt up to my trans

85e150six4mtod · #4 (**permalink**) 11-05-2009, 07:48 PM

FWIW, I would upgrade the six before I fooled with this swap. Stock for stock, the 300 wins against the 351M.