Hello Everyone,
  I'm new to this forum (Great place you all have here) and a bit new to the Y Blocks. I have now formed a love/hate relationship with my recently built motor. It’s a .030 292, all new valve train w/ hard seats, John M cam and blue thunder intake, headers, electronic distributor, road demon jr. 625 carb, high flow water pump and aluminum radiator w/ electric fan. Transmission is an AOD. A/F ratio ranges from 12.8 to 13.2 during driving and 12.2-12.5 at idle. Timing at idle is 14 with total at 38. I have tried switching from a 180 to a 160 deg thermostat with no change.
  As long as I’m doing 30mph or more the temps are fine but when I stop the temps climb up to 205 rather quick. I have confirmed the gauge with both IR readings and a second gauge that had NIST calibration. I have the fan on manual override to eliminate the fan temp switch.
  When I built the engine I did not drill the small holes in the deck as many do. My question is: Would it do any good to add a cross over in the rear section of the heads by connecting the 2 pipe plug ports that are on the heads right behind the intake manifold? This is a popular mod on many other engines and some intakes add this feature.
  Any other ideas and suggestions would be greatly appreciated.
 
Thanks,
   Wayne

Wayne
Located in Lineboro, MD
55 Retro Bird
65 Cobra FFR
69 Dart