Out with the 340 & in with the 410 stroker!

The entire push rod wall is too thin to really get straight or straight as an arrow to the bowl.

Engine pro 2.02 intakes w/undercut 11/32 stems
Ferrea 1.60 ex 5000 series.
both +.100 over standard gm length or like .025 over stock mopar length.
Valves were like a $130-16
Still have the push rod holes intact with the exception of a couple of thin spots where I brought it too far back towards the port window while working the push rod/inside turn wall, them 2 will get a tube or just lil epoxy, you can just get the tip of a pick through if that in just this one area on each, the rest tested good=with the the pick jabbing.lol

Really though, these numbers dont need relocation of push rods, it's the wall beyond that can effect the speed, at least in my case that opening/widening it helped slow it down some.

As for the ''bench'' It's a flow performance FP1, it's basically a processor with vac lines going to a custom psi sensing orifice which feed info to a in house computer, to put it crudely.....and it's very accurate and user friendly.
I had these heads tested on a superflow bench 2 yrs ago, when I tested with this FP bench, the numbers were practically identical..with even showing the same characteristics=turbulence @ same lifts/saturations.... Just as the superflow bench showed.
Before every test I check calibration of the FP bench with an O plate thats been tested to show 134.7 or whatever..@ 28'' on a real superflow, so if the bench does not match that at least within the weather/bar psi correction formula...I'll know.
Benches are very sensitive to psi changes even in the room-A/C on...lol
So far this bench has been very very accurate.
It cost me $1200 and change, they build all units per order so that ever bench is a fresh calibrated accurate and NOT mass produced with builder-machine error.
And one guy does all the building.

After woring with these heads and using the becnch to help show where the greatest gains are..I'm confident that I can routinely get 260cfm in lil time, about 20 min a port.
Its the last 20 cfm that gets hard to find meanwhile keeping 190's /240's cfm @ .300/.400, in other words, You could get 290's, but...for me...I dont see being able to keep as good a low lift number.....hmmmm........well now I'm just babbling.lol

We'll see where I go with this in a couple yrs...