Re: Adding telltale to ’72 V4 Home › Forum › Ask A Member › Adding telltale to ’72 V4 › Re: Adding telltale to ’72 V4 fleetwinUS Member - 2 YearsReplies: 4737Topics: 46 August 14, 2017 at 10:27 pm #63106 OK, I do remember that flat boss on the block, maybe for some of the choke plumbing on the original V4s…Be careful when directing the indicator flow, you don’t want the spray getting sucked inside the engine…