I went the low deck block route for a couple reasons, but mainly because it fits better in a stock frame/firewall A-body.

- Lower carb height for hood clearance
- Lower and narrower for headers, especially with raised port heads
- If using a factory block, I think the 400 mains webs are slightly stronger
- 4.250" stroke, 511 CID is all I wanted in a factory block
- I use the Indy low deck intake, so that is great they make both B and RB for MaxWedge

For big cube (572) in a chassis car with an aftermarket block, RB is the choice.

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