2016 AKRA engine rules vs now

[BMR Motorsports]

I have an AKRA clone that was built in 2016, it has never been ran and I’m wondering how much (rules) has changed since then to the current AKRA rules.

If there’s been some major changes, I’ll likely have to bring the engine up to spec before racing but it would be nice if the rules have stayed the same or close enough to where minor changes is all that’s needed.

Thanks in advance.

 

[flattop1]

Head for sure porting is allowed .
Numerous tweaks to everyrthing else .
mostly in the valve train .