Did I mess up buying this rust bucket?

Yes, that’s the end game plan. 434/340 based stroker W5 - 904 in a light weight duster.

A 340 inch or 5.6ltr if s considered big only by todays standards and a 6.4 is consider a mammoth sized engine. Not so! Not so, in my book.
they dont call em small blocks for nothing

i think the smallest engine in my garage is the 3 liter in my boat

in the cars it goes up from a 3.5 in the family hauler to 5.7 in my wifes car to 6.0 in the plow trick to 408 in the duster