Originally Posted by Grigg
Won't the gasket Billy needs, manifold gasket to head, be same as other 235s? Not hard to get.
Grigg,

You might be correct.

However, the GMC COE 270 exhaust manifold gasket/gaskets are different from the gasket/gaskets used on the standard GMC 270 exhaust manifold: the gasket/gaskets between the "heater box" between the intake manifold and the exhaust-manifold

Chevrolet Truck: Section 3.272 Gasket Intake to Exhaust Manifold : 39-54 DUBL DUTY and COE vs the gasket for other trucks