My 573sci has 350 hours on it.The blower went away at 250 hours.I had the Blower shop rebuild them.I am running a super chiller/smaller pulley and bigger fuel system.I did not touch the ecu.The motor does not use any oil and has been great.Question,Should I do the head gaskets and springs now or maybe first to a leak down to see how there are holding up ?I know the motor is very mild and most of the time never over 4000rpm.Happy Easter everyone!!!!!!!!!!

Always cheaper to do it now before a spring breaks, or head gasket fills the engine with water.

One of mine started loosing a gasket at 388 hrs,
others havent been as fortunate....I'd say you better do it.

mine were about gone at 225hrs. Change them

+1