408 windage tray

so after i read this question im curious...i just recently bought a built 318..i know nothing about. I'm taking it apart and its like a treasure chest. haha. but when i took the 4 cap bolts that the windage tray bolts to. there were two thick washers under them (maybe 5/8" total). Is this normal? i didnt even think to look to see if the crank was a stock one. could i possibly have a stroker? how can i tell?

if you read my last reply, the washers are there so the tray will clear the crank. because the main caps are not as tall as the 340 or 360. this is why when you buy a windage tray package, it comes with 8 washers. they go between the head of the bolt & the main cap.