PSI Valve Springs & mopar performance hyd cam

Hello All
A guy over here in Australia has a set of slightly used psi valve springs. done about 1500 k's. The specs are: 1.550 dual springs, id .755.. load is 150 @1.750 open load is 275@ 1.500 with coil bind at 1.190.
And he also has a mopar performance hyd cam mp296. has 521" lift and 296 " duration. denoted as an oval track cam. good power from 2800 to 6800. also mopar performance hyd lifters and mp cam break in lube new never used.
Now...I have a set of J heads with stage 2 porting 2.02 & 1.60 stainless valves + the valve stems have been milled down for cam lift, I have a edelbrock torker-II 340 & a holly 750 double pumper, All this is going on a 340 with 40up 10.5 forged pistons, My car is a 66 valiant that weights 2900 it has a 727 & 3.8 diff gears, I`m hoping to run high to mid 11`s
Will this cam & springs work on this setup that I have?? I have a set of yella terra roller rockes to use as well, Would a mechanical cam work better for what I want? If not, Can you suggest a cam that will.
All help will be very much appreciated.
Cheers Doug