Thoughts on this combo

There is absolutely Zero economy in that 284 cam

In a previous iteration, that exact same combo I have, had a Hughes HE2430AL cam, which is a 270/276/110, and with 1.6arms was .538/.549lift. This was a tyre fryer with 275s. It was very happy with a wide-ratio tranny. It pulled right off idle to whenever.I ran it with ratios down to 2.76s. One time I ran it with a double overdrive that was equal to 2.02 FinalDrive, and it pulled [email protected] think it power-peaked around 5300, but it didn't know when to quit.
It ran a 12.9 right off/ no tuning.Same AG and 750DP
It burned 87E10.
I set-up a 600Vacuum secondary for the highway and it pulled down 32 mpgUS, on a 10 hour trip.
Same engine,same car.Same dual 3inch pipes and Dynomaxers.It was a little heavier with passenger and gear;probably 4000 lbs.