Engine Gurus Chime in

[Ole Greenie]

Okay, I have been toying of tearing into my motor. It isn't just any motor...its a BBC LS6 454 Crate motor. It was built at the end of the production run in 1992 and has about 50K on it.

Some of you may know that this was a special motor because of all the race stuff it has. It is a good motor but I want to change out the cam and valve train to something better and quieter (It is a solid roller cam with a very smooth idle but slightly noisy). I have looked around at cam kits but can't make a decision because I really don't know how they will act given the 11:1 compression. Right now the motor doesn't get going till about 3500RPM and I'd like that to change to something around the 1800 with a strong wide band to 5500-6000 rpm. I'd also like a good quiet rumble at idle so not too much overlap.

So the question:

What would be the best cam set to get? I'm also considering changing out the rockers too and converting to TPI. Do you all have any suggestions? Motor has rectangle port cast iron heads.

Or should I just switch it all to an LS motor? I'd like a LQ4 with a 68mm turbo set-up, but Big Blocks look sweet in our trucks!

Thanks for the help!