Aftermarket block street strokers.

4.250 stroke is typically the limit for a true street engine. 4.50 fits, but usually forces you to go with external oiling which isn't a street friendly option. But this all depends on what you mean by "street". A daily driver is one thing, a hot rod that goes to the Dairy Queen once a month is a different thing.

why is an external oiling system not street friendly ?
I`ve got a couple thousand miles on my single line system , with a 9 qt. full sump pan , no problems with it/them... 505'' wedge .just because!