Smallish roller cam for DD 318LA

I rebuild a 305 for my suburban using a stock 350 vortec cam .414int.427 ext instead of the .353/373 factory roller and it now runs like a 350 but has good street manners EXECPT when in overdrive / aircond on. and light throttle ,but if I run 75mph its fine .it was perfect for a non/od trans .so if you look for something close to the 360 2-barrel cam in the 424lift area with the short duration it will work great
Thanks, you get what I'm trying to do. (just with a roller if possible)Also I do not have an overdrive transmission.