Pivoting from 340 to 360

which purple shaft?
whoever is advocating not building tight quench is way off base
I helped design the KB quench pistons with chief engineer John Erb at Silvolite and lots of dyno time to back up the combinations that work (much better)
problem with the FT pistons is you have to compromise on compression or advance to keep from detonating on the side away from the spark plug
you want the chamber under the plug- it's hard to light off way across the cylinder (worse on a big block and way worse with a dome)
you lower the compression or retard the spark then you have to give it more throttle which means more heat- so you retard it some more- vicious circle also less mileage
you can make FT work in a race motor with race gas and high rpm
they do not work near as well as a well blueprinted quench on the Street or street/strip and especially not Marine or towing/ motorhome
obviously closed chamber heads are easier- we used to take the trouble to weld up the open chamber iron heads
one thing at a time- keep the 600 for now