If you're looking at an off-the-shelfer, I don't think you're gonna get there without changing valve springs. A Comp 288R would be the closest, but it's got way more lift than your current camshaft.
I'd be looking at a custom, 284/284, 244/244 @ .050", 112 LSA, 108 ICL, .588" lift.
Should be able to use same valve springs, same lifters, same pushrods, etc. Overlap goes down to 60 from 78. That gives you plenty of vacuum, should help fuel economy since you're not pushing all your air/gas out the exhaust.
This is a perfect match IMHO, I wouldn't even second guess it unless you really want hyd roller.
A couple of things up front. I wasn't saying you need to change your intake or your gearing, those were only icing on the cake to make it more efficient. Your issue is a lack of tuning combined with a cam that is far from ideal for the engine
Some areas I think you really need to get to know.
Timing - Your initial timing is off 5 or so degrees, which means everything is off maybe more, maybe less, maybe the same amount. Regardless, most systems have a feature to sync the screen with the light. Then you get good data from the system. Then you can set total to what your combo wants and try all kinds of curves
Cam selection - looks like you should be on Cam 3, not sure where you are
IAC - generally throttle blades are adjusted for a desired IAC value, that gives a window for adjustment cold or hot
Throttle position - You have initial settings for a TPS, they tell the computer starting position for the blades, if you adjust blades you have to reset TPS so it knows idle and WOT, that needs to be done initially and any time you touch an idle screw on the TB with the IAC
Finally desired AFR for different things - Here's the deal, you can do much better with the cam you have, like I said looks like you would select "Cam 3" from the profile. However, it will never be perfect with so much overlap, but you may get significantly better.
If it were me, I would download directions from FITech, live on their forums, get to know the tricks and tweaks for a dual quad system and tune like crazy. If you can't get there, then do the cam. Then retune again. I will tell you this, the right tune with the right cam, will be a completely different engine than what you likely have now. Mileage will go up and power will go up while being more docile than ever when you and mama are cruising
If you need a hard copy of the instructions, contact FITech, but get to know initial setup, do some running logs, and put the old nugget to work, its a HUGE payoff as you are already seeing with just a timing tweak
I sure would love to see you go with Brent's cam, or even milder if you go hyd roller. Sorry about my recommendation error on lobes, the values were close but I was looking on the wrong page of the catalog, post surgery brain apparently I picked solid flat lobes instead of solid roller, but back in the game and Brent got to tease me by text a little to boot
