What to check before buying cam & avoid piston to valve clearance problems?

[HeavyHauler]

I am getting ready to buy a roller cam for my 1976 454 engine with 781 heads. The short block was built by some shop before I purchased the engine from my brother. Here are some of the specs that I know for sure about the engine. The engine is not how I would have built it but I got it for a good price.

454 at .060
Silvolite cast piston 1434-060 dome no valve reliefs and .015 below deck
Bore= 4.31
Stroke=4.00
Stock 781 cylinder heads with stock size valves


Before buying cam is there anything that you check?

I am aware that the only way to know for sure is to buy the cam and lifters,install and go through the necessary procedure to make sure there is proper valve to piston clearance but I was just wanting to know if there is anything I can check BEFORE buying a cam as far as lift goes?

I already know about cam selection in regards to compression,cylinder head flow,intake manifold selection,etc,etc, but that is not what I am asking about.

The hydraulic roller cams I am looking at are in the .550 to .600 lift range.