Unfortunately I had to sell the 5.3 LS engine to help finance all the small stuff you don't think about when putting a car together. I kept the headers though, and will most likely be doing a 6.0 instead. Got a few other things the car needs before I can take on that again. In the mean time...
With the column done I turned my attention back to the engine bay. Remember the broken 406 from page two? I finally got around to seeing what I was up against after the valve spring broke.
Really there was no major damage. The valve licked the piston putting just a tiny dent in it, but nothing more.
Another problem I found was that the factory harmonic balancer started to have issues, a good portion of the rubber ring was missing.
This motor had about 70K + miles on it but the cylinders all looked good, it doesn't burn oil and holds between 50 and 60 lbs of oil pressure so I decided to just clean it up go over the top end.
To make sure there wasn't any damage to the cam I pulled it out and inspected it. No damage found so I reinstalled it with a new double roller chain. Then the cover went back on and I added a new balancer. Sitting in a dark corner I've had some heads I experimented on about 15 years ago when I was learning how to port heads. They're just generic GM 400 heads but with the gasket match, improved port flow, blended bowls, new guides and a fresh valve job, this motor was a perfect reason to dust them off and pull 'em off the shelf. I threw those on with the Proform airgap dual plane intake and the new 600 Summit carb. I painted the top end of the engine semigloss black while the bottom end was VHT "Metallic Copper" engine paint. I designed and had printed some stickers and applied a couple to the valve covers. As of 5 months later the stickers haven't been affected by engine heat and still look new.
The cap is not one of those correct-a-caps, I simply bought a universal set of MSD wires where you make them to your own desired length and carefully set them up in a clean way. Here's the specs on the motor...
.030 400 small block Chevy, stock crank and rods with ARP bolts
high pressure oil pump and aftermarket pump drive
8.7:1 Eutectic pistons and plasma moly rings
Comp XE268 cam with true roller timing chain
ported factory heads with 1.5 /1.6 roller tip rockers, Comp's cam matched springs
air gap dual plane intake with Summit 600 Vac secs carb
factory HEI with Pertronix "Flame Thrower" upgrade kit and MSD wires
Hooker full length headers
Moroso alternator overdrive pulley, factory crank and water pump pullies
It's a pretty mild and basic budget build, though I'm guessing it makes about 300-325hp and 400-425 ft lbs at the flywheel. According to Comp Cam's online dyno speculation, it's torque peak should be right around 2200 rpms. Out driving it sure pulls hard from 2200 on up to about 4500, which is perfect for autocross. It'll do for now while I hunt down a decent 6.0 LS donor...