Pacesetters, ORY and CAI would "probably" get you about 40 HP. A "guesstimate" would be 293 RWHP or so.
Add the Hot cam kit and you would see another 30 HP or so.
The Hot cam is OKL but you could do better. ANY aftermarket cam in the low/mid 220 duration range (Comp CC 503, GM 846, my 223/230 .565/.565 112 LSA cam, etc), some Pro Form 66915 rockers and some Bullet VS 2700 valve springs would get you more low e3nd, more mid range and more top end for similar $$$ spent.
The Hot Cam springs are pretty week and can BARELY handle the Hot Cam and will NOT work with ANY aftermarket cams. they have 105 lbs on the seat, 280 lbs open and coil bind at .540 so "on paper", they are not safe for a .525 lift cam (you want at least .040" clearance before coil bind). the Hot Cam has such slow and lazy lobes that these springs do somehow work "OK" with this cam.
The Bullet VS 2700 springs that I mentioned will have 145 lbs on the seat, 380 lbs open and work with some prettty aggressive lobes. These are fine with the asymmetrical lobes that i use on my cams and can handle .565 lift with no worries. They coil bind way past .600 lift but a .565 lift cam with less than 230 duration will be fine with these springs.
If using 230 or more duration and spinning 6500 RPM or more, I would invest in a good dbl spring to control the valve trane better.