You are looking at a brand new ‘Noryl’ plastic Holden V8 Dust Inspection Cover made by Dellow Conversions in black.
This cover will suit A Dellow Conversions Bellhousing when using a Toyota Supra W55-W58. It can also be used when converting to a Muncie, Saginaw, Single Rail, Top Loader, T5 and Tremec TKO transmissions.
4 x 1/4″ UNC
2 x 5/16″ UNC