DrasselSBC

Hi everyone !

I am currently rebuilding a 283 bored .030 over for a 1985 C10. (3.42 rear end/29'' tires/Muncie SM465

The engine is completly rebuild and ready to assemble

Heres are the spec;

-Stock unported Brand new Vortec head from GM (yes i know they won't handle past .475 lift)

-Around 9.5:1 compression

-Dual plane slightly raised intake

-Rochester Q-jet Carburetor

-Single Exhaust ''log'' manifold for now but will be going to header and dual eventually.

-Redline will be 6k


Its mostly ready to assemble but i've been battling for several months on what cam I am gonna put in this thing.

Im not sure yet if I will retrofit it to a roller cam (Reliability) but I would like to.


I boiled down to these following cams what you guys think about that ?


-LUNATI STREET MASTER 272/282 HYDRAULIC ROLLER

• Advertised Duration (Int/Exh): 272/282
  
• Duration @ .050 (Int/Exh): 206/216
  
• Gross Valve Lift (Int/Exh): .447/.447
  
• LSA/ICL: 112/108
  
• Valve Lash (Int/Exh): Hyd/Hyd
  
• RPM Range: Idle-4800
  

COMP CAM HYDAULIC FLAT TAPPET CAM 260H

12-206-2 [49]

Duration @.050: 212in/212ex

Lift: .440in/.440ex

LSA;110


COMP CAM HYDRAULIC FLAT TAPPET CAM XE256H

12-234-2

Duration @.050: 212in/218ex

Lift: .447in/.454ex

LSA;110


If you guy have better idea from past experience or personnal knowledge fell free :P