Debating Changing From 1.5 To 1.6 Rocker Arms On A 340 That Has Out Of The Box Edelbrock Heads. I Have Plenty Of Valve To Piston Clearence, But Do Need To Know If The Edelbrock Heads Push Rod Holes Are Good To Go With The Added Angle Of The 1.6'S ? Thank You.

Pull a few valve spring and put light springs on them
to test it... I would just do the intakes myself..
I have never had any improvement on the exhaust...
but when you have the checker springs on you can roll
the engine over a bit at a time then push down
on the valve side a little and see how far you can
move the push rod towards the shaft to check clearance

I've got T&D 1.6 on mine no clearance issues with the push rods, running Smith bros. push rods

Out of curiosity what part number i are your heads. The set I have I my pushrods almost rub on the intake side of the pushrod hole with 1.5 rocker.

I don't recall what part number my heads are but they are the non magnum head. I am running Erson 1.6 rockers with a total lift of about .650 with no trouble.

Thanks Mr. Pbody. I have run both 1.6 and 1.5 rockers on these heads and the push rod almost rubs with both of them. My heads are 60179. I am thinking the shaft mounts are out of location or machined out of location. The rockers I have used are crane golds for the 1.6 and stock adjustable rockers for the 1.5s. I am planning on having them looked at this winter before I start the next build with these heads and figuring out why.

I Went Ahead And Installed The 1.6's Today & They Have Plenty Of Clearence.

It's very unlikely anything is wrong with your valve train stuff. It is what it is, grind away or use a good dinky pushrod. That is pretty much the options.