Cam Endplay

Just finished installing a solid street roller in my 340. It is a Comp street roller.I am using a Hughes Engines cam bolt and washer. When i tighten the cam bolt,
I have no endplay.If i put a spacer between the cam and cam washer,then tighten the cam i have endplay.I think the cam snout might be a little too short.
So , what would be the proper endplay for this roller? Thanks for your input.