I am in the process of doing the exact same thing to my Brewster 73 D-port auto.
I am going roller. I did the Eagle/Mahle 4.25 stoke kit. I am staying 100% numbers matching on the outside. That being said I also wanted a stock idle. I works with Lee Atkinson to design a cam.
My heads came in at 111cc’s and the pistons measured a 7cc dish. I went 4.185 bore
I’m at 8.6:1
I attached my cam card.
I had additional criteria to run my lifter dog bone setup to dramatically reduce the roller setup cost.
Stan
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