[Magnum Opless]

That's the valve relief on a stock 360 piston, my new cam ill be putting in with the 1.7s will be around .561/.569 and i shouldn't have any valve to piston clearance issues, im also going to use .620lift springs for a better seat pressure.

I don't think .535 is the max...

I'd be interested to know the duration on your cam. I also have a 360 with a fair bit of lift on the cam. I checked with clay and piston to valve was close but I thought it looked OK. However, I haven't run it yet so it's not a done deal yet.

In my case I have only .512/.512 lift (with 1.6 rockers) but I also decked the block 40 thou and used a .027 gasket, so my net equivalent is:

.512 + .040 + (.040 - .027) = .565

cam duration is 227/234 @ 50

I have the same springs as you.

 

[Magnum Opless]

FYI, Decking the block and head gasket thickness DOESN'T alter the cams net lift at all. It's still netting .512 lift.

Yes I know, I didn't say "net lift" I said "net equivalent".

I was talking about the distance between the valve and the piston. Decking the block and changing the gasket thickness DOES change that.

So in terms of P2V clearance I have the EQUIVALENT of running .565 net lift with stock block and gasket dimensions.

FYI

 

[Magnum Opless]

fwiw i am at .578 lift on my intake. stock piston 360

........there are folks running close .600 with no issues.

That makes me feel a lot better.

 

[Magnum Opless]

about .538 would be right