I found a complete 304 for $200 that someone else is selling. If it was mated to a manual tranny, I'd rather buy that one. Less work for me. It's just a ragged out Jeep that I bought for $50. It currently has a 258 with a crack down the entire side of the block, so that's why I'm looking to replace it. Besides, there's no replacement for displacement. Or, I could always buy an adapter and a 454 that a buddy of mine has in his barn...
1974 Jeep CJ5- 258 I6, 3.73 gears, Dana 20 T-case
1967 Chevrolet Fleetside LWB- 250 I6, 3-on-the-tree, 3.08 gears, A/C