Southern National Motorsports Park will follow the 2021 NASCAR Advance Auto Parts Weekly Series Rule Book.
2021 Late Model Stock
Late Model Stock Division 1 Class
Will follow the 2021 NASCAR Rule Book with the following exceptions:
OVERALL CAR WEIGHT (total/right side) and CARB requirements
- GM 602 crate: 3000/1300 390-4bbl & 1” Tapered alum. spacer
- GM 603/ZZ4 crate: 3000/1300 390-4bbl & 1” Tapered alum. spacer
- GM 604 crate: 3050/1350 500-2bbl, HBX or Ultra – 1″ Tapered alum. spacer
- Ford 347 Jr. crate: 3050/1350 390-4bbl & 1” Open Hole alum. spacer
- Ford 347 Sr. crate upgrade: 3125/1425 OLD 500 & OC adaptor plate – 7000 RPM Limit Set by Track
- Ford 347 Sr. crate : 3100/1400 450-2bbl & 350 adaptor – .75″ 2 hole non tapered alum spacer – 7000 RPM Limit Set by Track
- Chevy Spec Upgrade: 3125/1425 450-2bbl & 350 adaptor – .75″ 2 hole non tapered alum spacer – 7000 RPM Limit Set by Track
- GM Built Steal Head Angle Plug: 3050/1350 450-2bbl & 350 adaptor – 1″ Tapered alum. spacer
- GM Built Straight Plug includes Dillion 70cc: 3050/1370 – 450-2bbl & 350 adaptor – 1″ tapered alum spacer
- Ford Built Steel Head: 3050/1370 – 450 carb – 1″ Tapered spacer
- HMS Enforcer: 3100/1400 – 450 carb with 350 adaptor .75″ 2 hole Non Tapered spacer – 7000 RPM Limit Set by Track