Ram 98729 10.00 clutch

Hey all, im getting parts lined up to install a 65 4-speed in my 65 dart gt with a heathy 273. My qustion is has any of you early a-guys ran or tried this RAM clutch at all? Got all early a parts bell, flywheel & rekated parts. Don't wana halfta go to 10.5 to prevent slippage if at possable. Thanks in advance for advice!