Small Block & Big Block Chevy Specific - Truck cam for 85 silverado with 305

I have a 1985 LWB Silverado that has a brand new rebuilt 305 in it. My uncle built this motor a couple years back then parked the truck and I recently purchased the truck from him. The motor runs great but is gutless on the bottom end. I know its just a 305 so I don't expect much but I'm trying to get some more pulling power out of the motor. The heads have been ported, comp roller rockers, Edelbrock Performer intake, factory quadrojunk carb, LT headers and the motor has been punched 30" with factory dished pistons. Since the motor is "new" I don't want to pull it out and toss it, it does run good however I'm looking at a larger cam and wanted to see if this was too big or would be a good choice. It's a Comp Extreme Energy cam, specs are

268 - 280 Advertised Duration
224 - 230 Duration
.477 - .480 Lift
110º LSA
1600 - 5800 RPM range

I have purchased an Edelbrock Air Gap intake, Edelbrock 600cfm carb to top it off. The truck is a 2wd but is used for pulling a flatbed car trailer from time to time. Just looking for a wicked idle and more torque in the low to mid range. Thoughts?

Get something in the 220/224 looking spec @.050, would be better for you and what your doing.

So on the smaller side then? It's got a baby cam in it now, I think the specs are around low 400 something lift but I'm not sure the exact numbers. I know with lower compression I need to stick to less lift otherwise I will loose torque. I found this cam from summit racing, specs are:

224 / 224
.465 / .465
114 LSA

Would this have a somewhat choppy idle? Advertised duration is 282 intake and exhaust. I'm not too familiar with cams for a truck with low end torque numbers in mind. Thanks man

I would stay in the 214/220 range with your cam sizing, as most all of your cam rpm ranges given are for a 350 cid engine. Don't worry about lift, it is duration of the cam that will kill your TQ. You will also want to find a cam in the 111-108 LSA area for better low end TQ.

So less duration will be better but with more lift? The heads are ported, how much I do not know but I was weighing the thought of taking the heads off and having them milled down to get 9.5:1 compression at least and step the cam up a few notches. I'm sure I can get this little motor to pump out at least the same torque as a stock 350 modded surely. It picks up well once it gets moving but this truck is so heavy. Thanks for the help.

I am running the comp 268h high energy cam... good all around power, noticeable idle sound... and its in a 1983 C-10 2wd 3.73 gears and a 350

As far as low end power have you looked into the GM RV/Towing cam? I ran one in a 350 and it pulled strong Idle-3000, that and a better carb would do wonders for you.

Well I've made up my mind to pull the 305 out and throw this 355 I'm building in there. I was building this motor for my 85 cutlass but I've decided to put it in my truck instead. I just need more power to pull my car hauler and this 305 won't cut it no matter what I do to it. So since my wife will be driving the cutlass to car shows and whatnot, this is her car so she can enjoy the hobby as well, I'm putting a bigger cam in the motor, it's a comp Mutha Thumper mainly for the racy sound and a new intake and carb. This little motor will move that cutlass no problem and won't be enough for her to kill herself in. The specs on my 355 are:

Northern Auto parts build kit:
Speed pro 30 over coated flat top pistons
Moly Rings
Cloyes true roller timing set
Clevite bearings
Patriot Aluminum heads - 195cc intake runner
Edelbrock Air Gap intake
Edelbrock 750cfm carb
Comp Extreme 4x4 cam - X4270H camshaft, .480 / .498
Comp Cams Roller Rockers

The old truck should run pretty strong with this setup hopefully.