10. With our engine, we found the factory seven-quart oil pan on our Chevrolet Performance 572 wasn’t clearing the crossmember of the AME chassis. We didn’t learn this until our first test-fitting of the engine and trans. 10. With our engine, we found the factory seven-quart oil pan on our Chevrolet Performanc Test-Fitting "Sure, test fitting sounds like twice the work. But in today's world of reproduction parts, if all of the manufacturers are to the edge of their tolerances, without dry building before paint, you may find yoruself shimming, cutting, grinding, and even slotting holes to get the proper fit," Jim says as a note of caution. There are several aspects to this one, from checking fitment on a new chassis going underneath your car to making sure you're A/C unit fits correctly underneath the dash. In the case of the '70 convertible, the Vintage Air climate unit requires two tabs be secured to the firewall for proper mounting. To make sure the unit would be nice and secure, the shop went ahead and welded them to the firewall—something that wouldn't have been possible if the body had already been painted. Then there were the modifications to the firewall for running the A/C and heater lines, requiring further mods to the firewall. 10b. The area circled in the middle photo is where the problem was, and placed next to the solution, an aftermarket Milodon oil pan, shows the difference between the two. 10b. The area circled in the middle photo is where the problem was, and placed next to th Both of our project cars have had full aftermarket chassis installed in place of the factory originals. For the Chevelle, we had the prototype Art Morrison Enterprises '68-72 A-body chassis. One of the newest pieces out there, the AME unit bolted to the body a bit differently from the factory frame, require some test-fitting and tweaking to get everything just right. Our Fatman Fabrications chassis underneath the '55 has been in production for a few years, so the necessary mods for fitment are listed in the instructions. It still required some small mods for an exact, proper fit, but they were a known quantity. 10c. The Milodon pan cleared with no problems. You could notch the factory pan to clear, but going with the aftermarket part was easier and cheaper in the long run. 10c. The Milodon pan cleared with no problems. You could notch the factory pan to clear, Checking drivetrain fitment during the dry-build process requires the engine/trans to be installed and removed several times on a custom build. On a painted car, you only want to be installing the engine once, because each time it comes out increases the odds the paint will get nicked. This process also lets you check firewall clearance with the engine. Even though the Chevelle came with a big-block from the factory in '70, throw in our aftermarket chassis that tucks the body in closer to the frame, and you could have issues that require cutting and welding on the firewall. 11a. When we first started our Chevelle project, the plan was to rip out the Malibu sweep gauge dash and install a modified/customized version of the Chevelle dash. The guys at Ground Up Restorations sent us their new SS dash unit, which we test-fitted during the initial dry build. In the top left photo you can see where the mock-up of the gauge cluster was taking place, using the factory dash pad. But the shapes just weren’t going together. 11a. When we first started our Chevelle project, the plan was to rip out the Malibu sweep 11b. Then Keith at the shop started thinking and looking at the dash of a '69 Impala that was in the shop. Soon a plan came together, measurements made, and the cool discovery of the ’69 Impala dash being the same width as the Chevelle dash was made. 11b. Then Keith at the shop started thinking and looking at the dash of a '69 Impala that 11c. We sourced a '69 dash from a local salvage yard, and voila! We had a great structure to use for building a custom dash. Unlike the Chevelle dash, which is mostly plastic, the Impala structure is all metal, providing a great foundation for our gauge and dash mods. 11c. We sourced a '69 dash from a local salvage yard, and voila! We had a great structure SOURCES Art Morrison Enterprises 5301 8th Street E. Fife WA 98424 800-929-7188 www.artmorrison.com Classic Automotive Restoration Specialists Inc. 8235 Nautical Point Drive Belews Creek NC 27009 336-595-3900 www.classicautomotiverestoration.com Fatman Fabrications 8621-C Fairview Road, Highway 218 Charlotte NC 28227 704-545-0369 www.fatmanfab.com American Powertrain 931-646-4836 www.americanpowertrain.com « | 1 | 2 | View Full Article By Patrick Hill Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!