Need help choosing a cam 1969 340

Purple cam 286/474 in my younger brothers 70' 340 stock otherwise and was awesome. Eddy dual plane and it liked my 750DP more than the 650DP I gave him. He would swap them when I was not around and guarding! It was quicker than my 383 seemingly. Always had to detune him a bit cause he kept hurting it with cheap fuel in the late 80's.