NHRA classes 2023-2024

[64plybelvwgn]

In watching recent NHRA events ( youtube ) I see older engines in later model cars. Example: 64 cross-ram in a 67 belvedere. Cheby 283 in an 81 Camaro. The window designations appear like SS/AM or similar. Is this an original advertised HP with the later model weight ?

In advance, thanks to anyone who can clarify this as I'm getting nothing off the NHRA website ... or I'm looking under the wrong areas.

 

[R413]

Yes you can switch engines in super stock. Super stock GT is what it is called. They have their own horsepower and weight ratings for traditional SS, and then SSGT has separate horsepower and weight ratings. You can convert a front drive car to V8 rear drive.

You can see 60's cars with different engines than factory. So a 68 nova in GT/MA. Then a 1969 Camaro with a newer fuel Injected engine from a copo Camaro FGT/G