Tzei,
The 292 piston is a very tough designed piston in stock form. It is designed to withstand heavy loads and detonation(to a degree). There is a steel plate installed under the top ring and across the piston top. On a 292, I would not be afraid to boost 5-6 psi and if intercooled and great timing control 10 psi.
Compression at stock level is good (30 CC dish) , if going to a new piston 9.0 CR is good to aim for.
A stock cam will work well with stock compression. Tom
