With a solid roller, I would use some VERY GOOD new valves, simply because of the spring pressures you'll be using. It would not be a bad idea with a HR, either. These cams make more power by moving the valve open and closed more quickly - hence you need more spring pressure to CONTROL the valve.
If you go HR, do yourself a favor and go peak around on the LS-1, LT-1 and 5.0 messege boards and pay attention to the cam sizes those guys use to run 11 & 10's. The 0.050 specs are surprisingly small. Don't use a bigger cam than you need too ;-)
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.
'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust
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