Originally Posted by gregsdart
... after finding i had to clearance the block more for pushrod clearance. I didn't expect this, after running half inch and 7/16 pushrods in my megablock. But it took removing about . 060 in a couple of spots for intake pushrods, less in others.

Here is the place I clearanced my BMP block for 7/16" dia pushrod clearance, B1 offset rockers (1.7), and lifters with the offset pushrod seat.
It took a couple mockups and checks to get this right. Even the amount of rocker adjuster sticking out changes the clearance.

PushrodClearance1_labels.jpg
1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1