The NMCA Technical Committee made a rules adjustment today in the Factory Super Cars category. The revision includes an upper pulley size adjustment for the 2019-2020 GM 350 engine/2.65L Magnuson blower combination. The approved upper pulley for this combination has been adjusted from 3.350-inch to a 3.125-inch pulley. This adjustment goes into effect immediately, unless otherwise noted in this document.
The 2020 NMCA Class Rules and all Rule Revisions/Clarifications can be found here: https://www.nmcadigital.com/2020-event-info/class-rules-payouts/