power valve makes my 440 ping??

wow thanks for all the replys! not shore were to start now.

ok so I checked all the plugs not all of them show signs of ping, all are a nice tan brown thow.

I tryed octane boost n put an other $20 of 98 juice in it (from the same place as befor, dumb) took it for drive 3 or 4 miles engine temp stayed 160-170, stil pinging.

the car is a 65 valiant 4door (no 2doors till 68 in australia) all steel, untubbed, std suspension, no hood scoop.
tyers 275r 175f, 6 leaf rear 2" lowering blocks, 1/2" offset spring hangers spring in the top hole.
shortened c-body 8 3/4 housing n axles, yukon 489 case, 3.91 richmonds, strange spool n yoke.
home made connectors.
home built 727, full manual, hurst shifter.
modified 360 converter, 3600-3700 stall rpm.
.870" small block t-bars, pedders GSR shocks on all 4 corners.

30 over 11/73 440, 10.2 kwench dome KB pistons at .ooo, peened ly rods, stock steel crank, stock dampener checked for TDC.
moded stock windage tray, stock 6kwort pan.
208 valve, unported 906, bronz guides, 5 angle seats, found kwench depth varied from 105 to 125 thou so the heads were milled for 41 thou minimum kwench, some are low 60's tho.

800 holley dp milled choke smoothed ventuis.
stock iron 74 spread bore intake, egr milled out, plenum mod as per dc tech bulletin#34, cheep adaptor plate, no port match.
center drop exharst manifolds (yes I no, I no), 2 1/4 from the mans to single 3" pipe aero chamber muff, dumpt at the diff no tail pipe.

235@50 single pattern 507 lunati hyd, 108 in at 102, good cm pushrods, lunati springs, machined locks n retainers, stoch rockers.
dob roller t-chain, hv oil pump.
home built iron body no vac points dizzy (only 1 set of points in it) shimmed real tite, timing rocksteady past 4000rpm.
ngk plugs, mallory wires, bosch gt40 coil, 45amp alt internal reg.

1/2" alli fuel line, carter 72gph pump, fram filter, holley reg, 3/8 line reg to carb, no return line, 5psi fuel pres but creeps to 8-9 if left ideling.

mini starter, sfi flexplate. :cheers: has bin sitting a few months but the hole combo was fresh 400miles ago. thanks Tim
P.s tell me if I forgot some thing.