I have a 98 vortec motor converted to carbed, beehive springs and retainers set up for .550".
Can anybody suggest a cam/custom grind? It's going behind a manual trans and I would like some streetability (I don't care if it's barely streetable). I want as much power as I can get out of the thing.

 

If you truely want a custom grind for the most power, I would call the cam companies and give them your setup and have them make you one. Expensive but probably best results.

 

How about something like an XR276HR?

 

little bit small isn't it?

I've never been the best at matching heads and cam though so I can be wrong.

 

Well I guess really it depends on your bottom end. Anything bigger and you'll be pushing 6000rpms which is around the limit on a stock bottom end. If your bottom end is built to handle the RPMs, then go bigger. XR282HR would be nice but may push you beyond that range to make peak power. Also, if you plan to push the limit with those heads it would be a good idea to have some screw in studs since your talking higher rpm and higher lift.