Best bolt ons for a small block

For an air filter I’d try one of these AEM dry cleanable air filters:

https://www.ebay.com/itm/334000331996

I run one exclusively on my setup, early on I did some track t&t’s and saw no drop off or improvement over a K&N oiled equivalent filter. Search around they are still some NOS out there, not made anymore unfortunately just never caught on I reckon. It’s a quality made filter though.