4.8 cam help

[Hdchevyclassic]

Ive got a 2007 silverado classic with a 4.8l in it. I got afe cold air, gibson longtube headers, stock cats, dynoflow 3 inch cat back exhaust, and edge cts2 gas programmer.

I pull a 4500 pound trailer at least once a month and need more power. I keep getting told to put a cam in to make more power but the truck has 250000km on it.

Not dropping a 6.0l in it because people on kijiji are on crack

 

I mean im running premium, changing synthetic oil every 5000km, babying this truck, so is a cam worth it?

If so whats the best cam i can put in without changing valves and all that fun stuff?

If i put one in a motor with so many miles on it am i risking blowing the motor or tranny? Thanks

[Chris]

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