Build suggestions for 340?

Great thread.., but has anyone used the Lunati version of the 340 Hi Po cam part # 10201002...considering it for my build.
Lunati says: 298/308 duration @ 50 232/242, 462 intake lift / 473 exhaust lift LSA 112 /112. 2500-6500 RPM range. Also using J heads, with 2.02's. 68-70 exh, mans. Thinking about 2 1/2" head pipes with 3" H pipe exhaust dumping at rear axle, any feedback.?

Car is 72 Scamp 3.91's, 245/60/15 drag radials, 2500 convertor, 904 with low 1st gear. S/S springs, snubber.
Building for wife for weekend drag strip duty with the female gearhead club.:)
HotRod20