It should be putting out more rwhp than that. My stock 2V's with small hyd cam did that. But Dyno's can vary.
I'm going to guess that you're running that whole setup thru a single pea shooter exhaust?
Jetting has been touched on. Go a tad smaller and lean it up a bit. Your engine may not need the higher octane avgas......again, something to try on the dyno/track. 10.5 comp isn't over the top and shouldn't ping on 98 octane pump fuel. Higher octane is used with high comp motors that require the timing be knocked back if using lower octane fuel....due to pinging. If your engine can run great on 98 fuel.....anything greater won't necessarily increase power.
With avgas you'd need smaller jets compared to a lower octane fuel to get the ideal AFR.
Just be aware that avgas contains low amounts of lead and can result in huge fines if used on the street. It has a distinct smell/colour and I beleive traffic cops can test for lead in the exhaust.....some sort of probe thingy.
Timing is engine dependant too. Just a matter of playing with different settings on the dyno. I'd guess somewhere in the mid 30's for total timing. Just go up and down a few degrees until you find the peak and where it starts dipping again.
800ft/lb torque is Mack truck territory!! Just for info, my 393 stroker made 511 ft/lbs of tq on a trusted engine dyno.
Power and Torque have a related equation which is:
TQ = (HP x 5252)/rpm
........although I can't always get things to add up perfectly......just ball park gross checking.
Sometimes a dyno will spit out TRACTIVE EFFORT as the torque result........ which must not be confused with the actual torque figure which will be Foot Pounds or Newton Metres.
Tractive Effort is simply a value of POUNDS (lbs) or NEWTONS (N).
Here's the related equation....
Torque = (Tractive Effort x Tyre Radius)/Diff Ratio
eg: my old 351 made 1250 lbs of TE. I had 25" tyres or 1.05ft radius with 4.11 diff gears......which all spews out as 319ft/lbs of rear wheel torque.
IF the dyno guy plugged in 2.7 gears then it would say I had 486ft/lbs of torque.
But regardless of the dyno calibration....just aim for the peak numbers and you'll be right.
..........upper-cut for rambling