...but did you call Comp Cams and ask their advice, or did you just poke around their website? Call them.I do want a more aggressive idle, but more importantly I need more torque at lower rpms to get the truck moving easier, since it has a 4" lift and 33"(?) tires.
I've been doing some research and learned that most likely no matter what I go with, I'll have to replaced the valve springs and advance the timing. Now it's just a matter of finding what sort of duration will work with the TBI heads.
So whats the difference between advertised and actual duration?
I have two kits from Comp cams I've been looking at.
#1 Everything in this kit should work with very little modification.
Xtreme Energy 206/212 Hydraulic Roller K-Kit for OE Roller SBC
Xtreme Energy 206/212 Hydraulic Roller K-Kit for OE Roller SBC stock to mildly modified combinations. Strong torque and good mileage.www.compcams.com
#2 And this one, I check most of the boxes. I have headers; 3.73 gears; and 2400-ish converter stall. Although this one has a higher rpm range then #1. This one says it requires headers. I do have a pair, but they are intended for my C1500. So how would this affect the performance if I used the stock manifolds? https://www.compcams.com/xtreme-4x4-220-224-hydraulic-roller-k-kit-for-oe-roller-sbc.html
I live in Arkansas; no emissions testing. And the truck does not have catalytic converts(previous owner).
This is the better of the two cams for your application, but I'd call them to be sure there isn't something even better. www.compcams.com/xtreme-energy-206-212-hydraulic-roller-k-kit-for-oe-roller-sbc.html
Advertised duration is a claim with no standard. Duration @ .050" is a standard that everyone uses now. To keep gas mileage and driveability, you want to keep this number down around 220 or less. The factory duration on a TBI engine is 194/202, so if you want a more aggressive cam, aim above that. The cam above's 206/212 is respectable, and the .480/.487 lift is healthy. Put a free-flowing behind it and it'll have the sound you're looking for.
A full grand for a cam kit? Ugh. If you can run stock roller lifters, I would. If the lift were down in the sub-.450" range I'd run new stock springs, but with the .480"+ lift, I'd go with LS2 beehives and Comp's 787-16 retainers.
Call Comp Cams before you order to get a sanity check.