Reply to "picture of the rare, 1973 400 fmx block"

top fuel! LOL

yeah, there are structural issues with the block, it was cast in 2 different foundries, both the Cleveland foundry & the Michigan Casting Center, the blocks cast in the Michigan Casting Center before March 1977 have a problem with cracking in the lifter valley 1" above the lifter bores. Plus those are some very tall unsupported cylinder bores that would make this block a good candidate for a half fill with hard block.

Actually Gary, any Cleveland cylinder head will fit the 400, and any Cleveland intake can be adapted with spacers. CHI, Edelbrock and AFD all make an alloy 351C 2V head. You used the CHI 3V head, hence the necessity to use their intake manifold. 4V heads, high port Motorsport heads, can be used as well. All of the aftermarket intake manifolds designed specifically for the tall 400 block have Cleveland 2V size runners.

Ron to answer your question as best as I can, any 1973 Ford or Mercury sedan or station wagon equipped with a 400 AND the fmx automatic transmission is a possible donor for the fmx block.

Your top fuel friend on the PIBB, George