I will have to see this chain set up to believe it, I been looking at boat sites to find one, all the inlines based on the 250 Chevy use the gear drive, not chain.
If this is a reverse rotation engine, then they might spin the cam backwards using a chain in order to use the same cam in both CW and CCW rotating engines. I still couldn't find a replacement timing set with a chain for a 250 .
Joe
Last edited by Joe H; 05/09/2009 2:24 PM.