At first we tried to find an early 350 block for our build, but everything we found was either too expensive or worn out junk. After speaking with the guys over at AA Midwest, we found that we’re not the only ones having this problem since they are seeing fewer and fewer nice early-blocks as well. They suggested a later-model block, in this case from 1986. They are plentiful, in excellent condition, and can be had for a decent price. This four-bolt main block set us back $295 and included the seal retainer needed for the later one-piece main-seal blocks. AA Midwest also offers an adaptor so you can run a two-piece seal crank in a newer block. Here you can see the block after we cleaned it and had it rough honed.