318 to 440 Swap

I have a big block 727 core you could rebuild, $100 + praise, $ to ship it, maybe thru Greyhound. The 904 you have I do not believe will bolt up.

You might need better u joints (what are they 7160, 7290, ??)

Scumacher engine mount adapters, I recommend polyurethane k member bushings, new tie rods, & going thru ALL of the lower suspension, & the greatest priority is good brakes (front disk especially & power booster that fits), check the big block forum about headers or manifolds, the right size carb for your purpose {street/strip-drag}, good luck brother!