I took a GMC 270 out of a 1951 Chevy COE and it appears to have the GMC intake/exhaust setup. I've tried to identify the exhaust manifold # but can't find it (or even one similar) anywhere. Typically I can at least find a part # on gmpartswiki but even wildcard searches come up empty. 2090603 is my best guess at the exhaust casting #. Curious if anyone else has run into this. I'd upload a picture, but I'm having trouble finding where / how. Thx for any help you can provide. Derek
