It just depends on what crankshaft you go with and which rod length (and type)you use as to whether notching needs to be done. There are two 4.250" crankshafts available with different counterweight sizes...one uses a 6.200" rod, the other a 6.300" rod.
The work on the HV pump comes down to clearancing it to clear the counterweight on the crank. Dart block with a Scat forged 4" crank gets quite a bit of die grinder work on the
oil pump. I may look into something a little different here as I choose to run HV pumps on everything except factory rebuilds with stock pans. I think I may look into putting the cranks on a lathe and cutting the counterweights down a little or maybe use a billet pump.