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Yes, it is a clean short block. Date is 3/12/68 on the side and has D 440 HP and looks like a date code on the bottom flat part near distributor. Never bored previously. Has a clean crosshatch in the cylinders, too. The heads were removed and end with 915 with are from 1967, but I guess that doesn't matter as people tell me they are the same as 906 castings.

I got the assembled motor for $300 and I want to fix it up and put it in my '70 D100 stepside.



Those 915 heads are worth some money so if you sell them you'll have more money for your budget. The best bet is a set of good cylinder heads such as the Edelbrock RPMs as well as the proper cam and a good intake manifold. 500 hp is well within reach if you have decent compression. 10:1 would be great but you probably won't get that unless you change pistons.

I wrote an entire book about big block Mopar engines, might be a good place to start if this is your first big block.