Welcome to a disaster! What's worse, you are planning a disaster. The Comp XE275HL is newer and better than the XE274, but EITHER cam is too much for an engine that will rarely see over 3000rpm. With a 26" tire and 2.76 gears, 80mph will be 2855rpm plus converter slippage.
So you spend all the money and then the car is a dog around town and probably gets lousy gas mileage on the highway.
The .509 cam has 242 degrees duration at 50 lift, so saying something is milder than that is not saying much. The first cam that comes to mind for your combination is the Crower 271HDP which has 222 degrees intake duration at 50 and just under 1/2" lift.
The 267 HDP would be even better. Part number 32241. Its intake duration is 10 degrees larger than the stock Mopar HP cam.
The Comp Cams guy said it, people always pick too large a camshaft. That's one reason why most consumer type cams are ground 4 degrees advanced. I'd pick an intake lobe of 220 degrees at 50, exhaust lobe no more than 6 degrees longer, and LSA of around 110 degrees.
You'll get all sorts of crazy suggestions and many will be from people who apparently don't drive their cars anywhere except the drag strip. You have good flowing heads and don't need to crutch them with a huge camshaft.
R.
Fair enough. I will look at the Crower and some milder cams. I don't have a torque converter & I plan to get slightly taller tires soon, but I see your point. My 2.76 center section will be done months before I buy a cam, so I'm planning to test your theory with my current motor which has the XE274 in there right now.
I don't want to go too conservative...I have a lead foot & the nitrous system is staying on the car..... but cruising long distance is the intent of the new engine. I will check those cams out now.
