Sorry if this is probably overly ****, but maybe it will save a bunch of stupid back & forth questions, more information will always help... Possibly ignition timing wrong, maybe too far retarded, possibly or even too lean too, can cause those issues... what type of fuel you use can & will effect engine heat too, even spark plug heat ranges can add to it... what type of fuel are you using ?? what type of ignition & timing setting ?? what compression ratio ?? what heads ?? what camshaft ?? what size combustion chambers ?? what type of exhaust ?? how much under or overdrive in the blower ?? {although you said it was the same without the blower} what size & width radiator ?? does it even have a thermostat ?? if so what temp ?? or at-least a restrictor to slow the coolant flow down so it cools when it's in the radiator ?? what type of coolant are you using, if any ?? {there are additives like "purple ice" or wetter than water, that will sometimes help raise the boiling point or drop the engine temps, there's also waterless coolant like Evans Waterless Coolant, it ain't cheap, like $32 a gallon, but could be an option too}... have you check to make sure the lower or upper hose isn't collapsing?? do you have a overflow tank ?? what #psi pressure is the radiator cap ?? {for something like every PSI over like 16psi, it takes an additional 20* to reach the boiling point of the coolant} that is if the electric water pump {what gpm flow rate ??} & electric fan are adequate size {how many cfm ??} & flow rate &/or the radiator is sized properly & flows freely... what size cylinder over bore is it ?? what are the clearances are they loose or tight ??... the type of oil or lack of oil somewhere, can effect engine heat drastically too... If we can get some of these questions answered, maybe it will help others diagnose the overheating problems... good luck & happy Moparing
