Comp cams??

[ldtopham]

My 351c 2bbl rebuild is now nearing the stage where I need to choose a suitable cam shaft. I live in the U.K and cam choice is limited. I would be glad of any reports of comp cams magnum 270 or 280 hydraulic cam. The short limited info on these cams that I have read about mentions use with a torque converter but I will be using a manual box so what I need to know is how either of these would behave.(rpm range, driveability etc)
The engine spec to date:
351c 2blt mains block, bored 30 over stock, decked 10 under stock.
Standard rods, arp bolts.
KB177 pistons (compression 9.8:1).
Stock crank (checked out fine)

This is as far as I have got with my build to date. The heads are 2bbl (unfortunately open chamber 76.2cc but the pistons have increased the comp ratio some what), I plan to replace all valve train in the heads with performance items, a performer/ weixand intake and holley carb. The gearbox will be a T5 Tremec (3.31 diff) and all this is going in a Cobra kit car ( All up weight of around 2500 lbs).
I really don't want a switch like power band or have to rev hard so any ideas on how this set up might behave? Are the cams I'm looking at too radical? I can get Magnum comp cam 260 and 268 profiles as well would either of these be useable?
Any ideas onwhat bhp I might be looking at for the finished article?
Sorry the thread is so long but I have been away for some time and had far too much spare time to think up all these questions.

Thanks in advance for any replies.
Lee