I built one just the same, same KB 107 pistons, same heads, but I went one notch lower with the cam with th 286/276 one

and I used stock valve sizes on the heads....and a preformer intake, eddy carb.

I was impressed on how hard it pulled for what it was....

I was leaving my buddy with his 65 350 vette and my other buddy with his 65 Mustang Fback which had a 302 with aluminum eddy heads, and a bunch of other stuff in the dust!!!