[For Paw]

I have a 1966 SO with a lumpy cam (not extreme). I am running Dual Quads Holley 1850's. I started with Dual 390's but the carbs were defective from my engine builder so he replaced them with these. I have an MSD 6AL with Blaster Coil and and Ford Electronic Distributor, and a MSD 105 AMP one wire Alternator. I have disconnected the alternator while running and I am getting full current. All these things seem to be in working order.

Ever since I first started this newly rebuilt engine, I have had a lot of trouble getting it to idle when the cooling fans kick in. They are on a proper relay circuit, and all my grounds are new and in good shape. I have had to advance the timing to 18 initial just to compensate for the fans. I have done a fair bit of tuning to the carbs. It does idle pretty Ok now, but with this much advance it's getting hard to start when hot. The engine maybe has a total of 3 hrs-so it is not really broken in yet. Any ideas out there or has anyone experienced this "drag". For other reasons, I am thinking of switching to Weber stacks and wondered if this might help the idling or timing issues?

Thanks to one and all.

ForPaw