Rebuilding a 65 273..I need some help.

Dmopower said

Sorry to hijack this thread but these seem to be the guys to ask. On a 67 273 2v head. Can 1.6 and 1.88 valves be installed and used and does the block need notched? My engine is .060 over. I have a 2v engine that's been rebuilt. It has dual ext and a 4v manifold. I'm thinking of swapping in a cam, and port matching the heads, intake and adding the bigger valves and some port work to pep it up some. Also thinking about milling the heads in an attempt to get closer to 9.5 comp. Your knowledge and exp is much appreciated. Thanks guys.

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67 heads should be closed chamber 920 castings. Guys racing 273's, not me, have said cut down 1.88 to 1.84 will work without being shrouded in 920 chambers. I would not bother with the 1.60 exhaust valves. I have run 1.88 intake intakes with 340 J heads on my +.040 273, but I centered the chambers over the bores with offset dowels, no bore notch. Worked great with a stock 340 cam if that helps, but I was running 10.5:1 pistons. Now, I just get a custom solid cam from Racer Brown and be done. You should already have the solid lifter rocker set up.