This back-up motor is a pump gas short block, and I have my old Scott Brown solid, flat tappet, 272/280 cam and lifters for it that have been used in this block for hundreds of passes. The back-up heads are the EM 470 heads, epoxy ported Mopar Perf Stage VI, that flow about the same as my current Indy 440-1 heads.

I have picked up the used roller cam, used offset roller lifters, etc., just in case I want to try them in my current motor (during an off season refresh).

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