Curt, after decking the block do you run into valve-piston interference? Seems to me that it moves the valve closer to the piston either way.
Is the 235 head really that much better, I just paid to mag the 261? Thanks for the torque pattern info, I thought I had read that somewhere.
The McGurk article explains that you would have to mill 1/8” off the 261 truck head to match what taking 1/32” off the 848 one would do for compression but personally I would never go there and as stated that might even require custom pushrods. The presence of interference is a possibility that is dependent on several variables like camshaft lift, deck or head milling, head gasket thickness, and previous valve reseating. I will nick the pistons for clearance if necessary in my case but one should always pay attention to “cause and effect” when making modifications.
