I need to go look in the "Heap" lol...Does yours have rear risers? What year? what side? The Penta manifold will have an odd transition but will work with some, well, work

, is it a Volvo or a Waukesha? Small differences, the Waukesha's are nicer with a higher than normal nickle content...read; last forever.
You probably have an 888 Merc?
GT