This is a new dipstick and tube assembly designed specifically for Ford Highboy 4x4 trucks that have stock cast iron exhaust manifolds. These assemblies fit the rear sump FE engines with the dipstick tube that goes in the pan. These will fit either the 6 or 8 quart oil pans.
Our new dipstick tubes will not fit with headers, here is a listing for a new dipstick and tube that will fit an engine equipped with headers:
ebay.com/itm/364345946199