Bottom End Shocker Build

rumblefish360 said
Then widening the port window like I did above and way back where the bolt hole protrudes into the port are the big keys from what I learn from @pittsburghracer who can shed more light on where to go and what to do.

At the 280 cfm ProMaxx reports, you can still do quite well.

I witnessed to sbm shockers on the bench and they do flow as advertised…getting them to 300 might take some work…maybe try some different valve angles