Re: Beefing up the 327
My advice would be don't go too large with the upper end if you have high gears and a auto trans such as a glide.
Some good combinations would be 10.5:1-11:1 compression, comp 280H-286H magnum, decent dual plane intake (perf rpm), holley based carb no larger than 650cfm, there is a broad choice for cylinder heads depending on how much money you want to spend, I would suggest a good after market aluminum head no larger than 170cc runners 2.02/1.60 valves, full roller rockers, some kind of long tube headers, I would say get 1-3/4".
I'm confident the .040" 327 we built has 370-380hp at the crank, similar specs to above, decked block to .015", .025" composite head gasket, 10.8:1 comp cams 286H-10 magnum, not so great after market aluminum heads that are a tad too big (190cc runners) 58cc 2.02/1.60
Pulls really hard from 2,500rpm-7,000rpm
The cams you listed are decent for a lower compression ratio, it would be better to have the lift nearing .500" to take advantage of the better cylinder heads you are going to run. The 280H is 230* @.050 with .480" lift on a 110lsa, the 286H is a step above; 236 @ .050 .490" lift on a 110lsa, both of those will get you the "sound" you are looking for. I wouldn't recommend putting the 286 in anything lower than 10.8:1-11:1 compression, especially in a 327.
The only Mustang I'd ever own is a Fender.
'68 333" Camaro
'14 5.0 Mustang