11 second street car?

Don't waste the time to put a 4 bolt main on a SB mopar. Don't need it. Unless you are going to some crazy HP levels, then a stock block isn't a consideration, get an R series block. Good studs and stock caps are capable of holding 600hp.

The 4 bolt caps weaken the block on stock SB's. Not enough material in the area the bolts enter. The R series and rare TA block have better webbing to accept 4 bolt mains.