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You have the roller setup already?
If you go roller you need everything that goes along with it. You can buy them kitted so everything comes with it or you can source the factory setup and reuse some of the original stuff if you are trying to save some coin. I would recommend you do your homework and pick a cam that does everything you want right in the middle.http://www.compperformancegroupstores.com/store/merchant.mvc?Screen=CTGY&Store_Code=CC&Category_Code=RLERCAMXE
That cam is about the max I would use for a DD in a heavy truck, but should work fine with your compression and heads. The 4 speed will help since you can get the RPM up to offset a cam that will probably be a little soft until you get off the line. Do you also have large tires? 3.73 will be fine with something close to stock height tires, but you may need lower gears if you have 33's, and definitely if you have 35's.I happen to like the Howards line of roller cams, and they might be cheaper than the GM products. Also verify the lift that your heads and springs can handle. It should be fine, but you should check anyway.Bruce
Yes and what heads are you using? Do you know what the max lift is with your springs?
Well just make sure they match the cam lift you choose and that you don't run into clearance issues or coil bind. I'd be leery of no name cylinder heads