SM Head Modifications on a budget

I don’t know if PBR keeps track of his time while porting, but since he’s quite familiar with porting these heads into the 290+ range, I’d love to know how long it takes him to do the complete porting(just the porting) for one intake port.
From as cast to the final touches of burr finish.

I would think by this point in the game, for that flow level there’s no more R&D……… you’d just go in and get it done.