i'm 99% sure that any thing 2200+ or higher are t-breds. anything 2400+ or higher are b-core.
i've got a 2100+ running @ 2700+ speeds and idle temp = 30, full load = 34. this is on a Soyo KT333 Dragon Ultra Platinum mobo and the Vantec Aeroflow HSF.
mobos can be different in their temp readings as well since they aren't reading from the internal diode, but rather a temp diode in the socket. as well, some mobos put in some kind of "correction factor" so you'd need some data from another Chaintech owner for a better apples to apples comparo.
i think it's worth it to ditch the thermal pad, especially if it's not providing a good contact due to whatever happened in your original install.
some goo-gone or the like will work. i used this on my Vantec prior to using some ASII. you can use goo-gone on the CPU as well, but don't get any on the 4 rubber "dots" it will disolve the adhesive and weaken the dots (not that i've done that or anything!

) it's not too big a deal to do (though your problems w/ HSF install may indicate otherwise).