The 264/268 roller Andy used is .144@TDC, when installed at 106.

So, that’s not going to buy you any room.

It’s also .446 lobe lift.

My feeling about your heads/combo are this.......
There is no doubt in my mind your current long block(with whatever tweaks might be necessary to provide adequate v/p clearance) would make solidly over 700hp.

Brads std port stock stroke combo made close to 700hp, and I’m sure it could best that mark with just a cam swap to something a little more aggressive.

But that ...... and $1.59 will buy you a cup of coffee.

It does appear from the pic of the piston that the radial clearance of the intake pocket might need to be addressed.



If you feel like you just have to have them........ just order ‘em up!
Be an interesting test for sure.