It’s always nice to see the aftermarket manufacturers getting involved in social media, whether it’s the administration of a Facebook page or, as seen in this video from Moroso Performance Products, the installation of a a Crank Trigger distributor [PN 72256] for small- and big-block Chevrolet engines.
As this distributor comes fully assembled (save for the distributor cap) but must be disassembled for proper installation, it’s critical to follow all of the steps in order. Once the distributor is taken apart and laid out on the bench, the Moroso technician covers a number of the critical issues that you face when installing the part; most notably, the correct installed height of the distributor. As this particular part number covers a variety of engine and manifold combinations, it features a threaded, adjustable billet collar assembly that permits you to set the height of the distributor and subsequently optimize the location of the driven gear on the camshaft. Setting the endplay height only needs to happen one time upon initial installation, and is designed to set between .080 and .090-inch of gap between the distributor and the block.
Having the proper amount of endplay also assures that the o-rings on the distributor are in the proper place within the block to permit proper oil flow. The set-it-and-forget-it design reminds one of Ron Popeil’s Showtime Rotisserie — but it really does work in this application. The O-ring seal design at the top of the distributor, underneath the adjustable clamp, will actually assist in generating engine vacuum since no silicone is required to seal the whole works up. From there, it’s a simple reassembly of the distributor and phasing can begin — which is another neat feature of the distributor. The adjustable mount on top means that you can phase the rotor without ever taking the hold-down bolt out of the manifold. An innovative design, and one that appears to be just as easy to install as the video makes it out to be.