New car finally hitting the track: estimates?

What's in place to put the power to the pavement, rearend,leafsprings,coilovers, caltracs, snubber,4-link etc. ?

Snubber, Qa1 90/10 front. /6 bars.

compression? heads proted?

10.5:1, 160 cranking psi, heads are OOTB.

456 and those tires 28's - trap will be about 6300/6400. Is that what the engine is built for?

That engine is falling off a little in dyno power at that RPm. Seat of the pants it will pull it.

I have a 4th gear don't forget so I can try running it through at 6300 or shift another gear.