Bought a 2000 banshee has, stage IV port/polish, cool head, pipes, etc. Gonna do an engine overhaul and thinking about making it a stroker. Looking at a 4mm stroker crank 110mm rods and 58mm stroke. It was saying something about the exhaust port being less than 28 MM I need to use a differnet spacer plate? Can someone explain this more(not sure about my exhaust port height with the port job). Also as far as compression and my coolhead will i need to get different domes? Will the pistons hit? will there be an increase or decrease in compression? What pistons to use? Just trying to figure out what all I am going to need. Thanks for the input.