Agro,
Chuck Miller has run has run his 351 Ford crate engine JBL in the 33's many times in open track events.
John Morton ran a 302 JBL car in the 28's. (Of course the driver had nothing to do with this.)
I have run Chucks car in the 29's. (Note: perfect day, perfect track.)
I bet that Scott can get into the mid 20's with a bit of chassis and aero work and a good track.