Should I go bigger on the cam?

The Lunati will have a much lower RPM range and just a slightly lumpy idle where-as the comp will be pretty nasty idling and pull like a bear to approx. 6500. The 3.91 gears and 3800 converter will support the XE282S. A buddy of mine had one in his 67 Cuda with mildly ported X heads, a 4000 converter and 4.11's and ran 12.30's with it running out of fuel at about 1200 feet. He never got the fuel issue worked out before he decided to do a stroker so we never really got to see what it would actually do but I think high 11's would have been possible. I have that same cam and lifters of his under my bench awaiting a new home. If you'd be interested in a real nice used set I'd make you a heck of a deal. All the lifters were carefully put in order in a lifter box and numbered so you can put them right back where they were.