I need a new prop or used for my ericson 27 i have the atomic 4 engine. my boat was built in 1978. a stock prop will do but i need to know the size and shaft bore ect. and any info where i can find one at a good price. my boat is in ventura and i'm hauling it out for fresh bottom paint and would like to have the prop ready for a quick replacement. any info would be greatly appreciated. thank you all in advance, dave