ultimate street 318

Splayed bolt main caps aren't good on a stock LA block. Not enough material in the areas the bolts go and it weakens the block webbing. There's no reason to put 4 bolt caps on a stock block SB mopar unless you plan on 600+ HP. If you are in that hp arena... a different block would be a better choice.

Hard blocking is a good idea for a 550+ hp deal.