I dont think the XE 268 would match too well with a stock converter. my feelings are about 216-218 duration @ .050 are about as far as i would go with a stock converter. all of the cams that I ran were ground on 110 lobe separation angles. If you tighten the sep angles up to say 106, the eng will idle choppier, & could use a little extra stall even though the duration @ .050 doesnt look that bad. If i had my choice , i would be "rowin" a 6 spd richmond box in that old longhorn, then I could run a lot more cam! I guess it depends on what you want to do with the truck, the longhorn is not a hauler(just a toy), but does have good street manners. If you want a dual purpose truck, i have found its better to be a little conservative on cam selection........then you can work it all week, & play on the weekend. good luck ....crazy longhorn
