With the exterior and individual bores of the carb clean we are ready to start removing the old parts.
This plastic choke unit is old and brittle, so we will be replacing it with a metal one from another Holley we had in the shop. This is a great opportunity to convert a manual choke to electric. Four screws and a cotter pin hold the choke on. Remove the screws and top half of the choke first.
Most of the parts we needed for this rebuild are included in the QFT Performance non-stick gasket kit (# 3-200). We also ordered a billet primary metering block (# 34-8) and secondary metering block conversion kit (# 34-66). The adjustable vacuum secondary kit (# 63-1) rounded out our rebuild parts list.
To remove the vacuum secondary, first remove the C-clip attaching the connecting rod to the secondary throttle shaft.
With the choke, screws and clip removed, pull the old vacuum solenoid away from the main body. There is a small gasket around the vacuum port; be sure to remove the old one and replace it with the gasket supplied with the new solenoid.
While not everyone may entertain thoughts of rebuilding a carburetor, what you'll see in the photos is a pretty easy "by-the-numbers" process, which we feel is within the scope of most do-it-yourselfers. Follow along with our slideshow on the next page and see just how easy this upgrade/rebuild project is, and we're sure you'll reap the performance and economical benefits associated with this readily available performance upgrade.
