I tried to search and find this information, but couldn't....maybe I just didn't use the right keywords.

I have a 1965 289 with a 4 speed toploader and I'm trying to figure out what size clutch I need. There's options for input spline diamter, spline quantity, and disc diameter. Does anyone know which one I need? Or do I need to get more information off of the tranny? I'm trying to avoid having to remove the clutch, and then order the kit and have to wait until it arrives. Thanks!

 

Prolly gonna be a 10" 1-1/16" 10 spline. A 10.5" might fit if the flywheel has provisions for it, but 10" was the standard size. You might want to double check though, if the trans was rebuilt, it may have a 1-1/8" 26 spline. I think some of the big block Toploaders may have been 26ers also, but I'm not sure.

 

That's what I figured, but wanted some confirmation. Thanks!!!!