October 2010 Chevy High Performance Q&A

Kevin McClelland Aug 30, 2010 0 Comment(s)
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Hope this gives you the info to refinish your wheels properly. Those are some of the nicest wheels GM ever put on a muscle car. We've had Chevelle SS wheels, Vette and Camaro Rallys, on just about everything that we've owned over the years. The Chevelle SS's were our favorite.
Source: eastwood.com

Little Deuce
Q: I've been away from working on muscle cars for quite a while. I purchased a '67 Chevy II with a 230 L6 and a Powerglide. My 5-year-old Goodwrench 350 has less than 1,000 miles on it. Once I purchase the adapter kit with the oil pan, mounts, pickup, and pump, will this fit into my car? I ask because the original 283 and 327 blocks have the recessed oil filter boss. I'm concerned that after I spend the money it will be a waste. The engine also has the '67-72 Chevy truck swept-back ram horns-in other words, they don't dump straight down like a Vette. It looks like they will clear the front suspension. Am I right?

Can I fit my 186 fuelie heads on this engine without a problem? I want to go with a Comp Cams Thumpr Cam, 186 heads (April '70 casting), an Air-Gap manifold, and a 600-cfm carb. What cam should I go with? This is just for cruising, by the way.
Castle Rock, WA

A: The base GM Goodwrench engine is a strong foundation for building a mild-performance small-block. Yes, the Chevy II small-blocks had a recessed oil filter pad to allow the exhaust head pipe to run under the oil filter. This gave the clearance necessary for the suspension and ground clearance. You know, the old 25-pounds of poop in a 5-pound bag! The exhaust manifolds you're referring to are, as you stated, for Chevy pickups. These manifolds will not clear the suspension. Chevy II production exhaust manifolds won't fit the Goodwrench block because of the oil filter location, but there are headers out there that will clear the oil filter in the standard small-block location. Hedman makes a nice set of compact, in-frame, full-length headers (PN 68160) that will work with the standard oil filter location. They feature a 11/2-inch primary pipe and a 3-inch collector. The headers require that you use a 153-tooth flexplate or flywheel to keep the starter up against the block.

The Goodwrench engine will love your 186 casting fuelie heads. The 64cc combustion chambers will raise the compression from the pedestrian 8:1 up to a little over 9:1. This will really help with your camshaft selection. For a nice cruiser camshaft, we would go with the smallest Thumpr camshaft Comp offers (grind number 279TH-7, PN 12-600-4). It specs out at 227/241 degrees duration at 0.050-inch tappet lift, 0.479/0.465-inch max lift, ground on a tight 107 separation angle, and installed at 102 degrees intake centerline. This camshaft has a ton of overlap and will give you a very authoritative idle sound. Let's just put it this way, with performance mufflers your neighbors will know when you come home!

Good luck with your little Deuce project. The '67s are my favorite of the early Shoeboxes. I have really cool memories of these from my high school days. Helping my buddies swap out parts and hauling ass around. Have fun!
Sources: compcams.com, hedman.com

G-Bodies That Fly
Q: I'm looking for help with picking a cam that would be both streetable and track worthy. The setup is an '87 Monte Carlo SS (full interior) with a 3.90:1 gear, a TH350 trans, and a 3,200-stall converter. The engine is a stock LQ4 6.0L with an Edelbrock dual-plane LS1 intake, retrofit headers, a 750 Holley double-pumper carb, and an MSD 6LS. The exhaust will be a 21/2-inch with an X-pipe. I look to drive the car 300-500 miles a month and take it to the track twice a month. I've contacted a few different companies with mixed results. I was looking at an old article with the GM Hot Cam, which yielded some pretty nice numbers. This was only the engine alone though.


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