Budget 318 build

The larger cams timing events lower the dynamic compression ratio. (Dynamic compression ratio is when the engine is spinning and the valves are moving. @AJforums could explain this best I think.)
The valves are opening longer for more air and fuel but also allowing some pressure to escape. This is why cam manufacturers recomend higher static compression ratios with bigger cams. 10-1, 11-1, 12.-1 etc...

With a bigger cam, the dynamic or cranking pressure drops and this drops Efficiency. This makes the bottom end of the rpm scale feel soggy or soft due to the lack of power being developed.

Measuring exactly where the piston is in the cylinder combined with the head gasket dimensions and cylinder head cc amounts will yield the exact static compression ratio (10-1, 11-1 etc...) to help guide you.

A few cam dealers will state what they would like to see in cylinder psi which would be dynamic ratio. Static ratio doesn’t change. Dynamic will with a cam change.

Fellas, IMO, the cam choice doesn’t warrant any worry what so ever. Here is the link to the cam. If I’m correct.
Summit Racing® Classic Cam and Lifter Kits SUM-K6900