Louisenslin

HI Guys
New to the Forum, I hope im posting this in the right part of this forum.

There are 2 issues:

1: She seems to diesl all the time, I've got BP6FS plugs in, and haven't tried colder ones, the Plugs are perfect gray brownish couler. No pre ignition, Static 10 BTDC and goes up to 32 / 34 at about 3500rpm. Dont know if the holley dubble pumper is the culprit, changing to Edelbrock 1405 this weekend to see if that helps. What else can it be? Would the changing the carb effect this at all?

2:Then the temp used to run around 90 degrees Celcius which was normal, ocationally driving around it goes up to 98 then back to 90 again.

Recently its been going up to 100 - 110 degrees celcius driving around, so I jacked her up, put a spring in the bottom pipe by the pump, replaced the thermostat refilled with 50% water 50% coolent roughly ( 3 litres of coolent, rest water) No leakes etc. Started her last night on the jacks and goes to about 95 then fans kick it goes to about 89 etc etc, which seems normal. will drive tonight and see if its still stable. If not, what else could it be? the water pump " sounds" fine and doesnt leak, any other things to look at?

I've got an AC Cobra replica with a Ford 351 C mild/hot cams, Holly dubble pumper ( busy putting 1405 edelbrock on, weekend ) the Holley needs to be constantly tuned! Petronix III vacuum/ mechanical advance distributer. NKG BP6FS plugs opened the gaps to +-.048 from .035. Ford C6 box, Car idling at about 800 rpm in nautral/park and about 450 in drive. Edelbrock intake.

Thanks for the help!