the cam i'm planning on ordering comes as a kit w/valves springs,retainers,etc...so i will not run into problems i think???

I think it must be a badly mismatched kit for your use then.

That much lift must have very long duration or the valve acceleration rates would be too high.

I would think the cam would have 280 degrees at .050' lift! This cam would be a 6000 rpm plus only cam. Who made the decision on this cam

the rpm range is 4500-9500....its a full race cam...the reason i want to use that cam is because of the heads it will turn....the heavyidle will scare people...any way i thought about it and i might just go with a .540 kit...which is a raddy street cam..duration is .292...around there...i hope i still get that killer characteristics of a full race cam...well the sound and lummpyness... what do u guys think....
has anyone used a high lift cam...how was it????

With that sort of duration you can run a pretty high static compression ratio as the valve overlap will drop the effective compression ratio. A high compression ratio also means a higher suction to draw the air/fuel mix into the chamber.

That lift figure would have to be at the valve. You would be hard pressed to fit the cam in the tunnel otherwise. Unless the base circles are ground right back.

If you are just after a rough idle, just pull the choke out! or close the points gap. . .

The higher the lift, the more radical the angles on the rocker gear, the more wear.

Try something with a more conservative lift and if you want more out of it latter, put a set of higher ratio rockers in.

If you are just after a rough idle, just pull the choke out! or close the points gap. . .

Doh! Just realised that this is concerning an L series engine.

Disregard, the cam tunnel comment and rocker ratio comment.