is this the cam you are referring to?
“292 H.O. Marine” 262 / 262 0.442 / 0.442
then there is this one
"Chevrolet L6 194, 230, 250 1962-1984
Duration @ 0.050 Lift: Int. 194° /Exh. 204°
Advertised Duration: Int. 260° /Exh. 270°
Gross Valve Lift: .464"/.490"
Deg. Lobe Center: 110 LC
There is a custom cam grinder in my area that I can have him grind me a custom cam. was thinking something in the 470 lift and 218-220 duration at .050 an 106-108 lsa
