dodgycanuck,
When you get a camshaft for your blown 250, get a custom grind camshaft from CompCams & go with what they recommend.
I would recommend a camshaft w/a lobe center of 115 or wider.
MBHD
Here is where I went when I was looking for my cam. Recommended.
LUNATI CAM TECH HELP: steve - turbo cam w/ emphasis on torque and efficiency - reverse design
212/202, 270/262 adv. dur , 114 LSA, .465/ .458 lift - hydraulic flat
$187 plus shipping -- $66 hydraulic lifters