Originally Posted by sptt

Not necessarily, but the EHA Valve (very noticeable difference in idle), Injectors, and the $29.99 BARS Head Gasket Sealant (after a few days of running this, starts kept getting better). I think with that old block, that if you have good coolant pressure, coolant leaks into the engine block and causes the hard cold starts. When I flushed my coolant, I think I pressured the sealant particles out and had to redo the BARS treatment because it was horrible to start and I was smoking at startup for a while until it burned it all off. It does not clog up your radiator either. I have very good flow and coolant color. The proper battery for this car is also a must as it cranks very hard.