You really don't need a spit. Get on cowgirls blog (she's a member here) and see how she does it. Simple and effective.
Big BarBChef built in to the Outdoor Kitchen, Weber kettle, 1 UDS, Little Chief Electric, 2 Propane Fish Cookers/Turkey Fryers,
a swinging grate over my Fire pit, Big Pig Cooker, SJS.
"Nice talkin' to ya"