LD340 before and after porting numbers.

Southest Gassers Super Stock class not NHRA -
4 speed only
No 4 links or Cal tracs
Max overbore 0.60
Specific alum heads allowed and weight added for heads
Hoosier designed a specific tire for group basically 1967 NHRA tire rule (7") wide 29" tall
Dual plane intakes only 1" spacer allowed
9.5 Lbs per cubic inch (small block) with driver
3100 pounds min weight regardless of cubic inch