Broke extension housing on dyno run,had some vibe ,re balanced drive shaft, seems better on road but cant replicate dyno speed on road-Police problem!! anybody else encounterd same problem?
68 fish 520 stroker.TTI 2" headers edelbrock RPM heads. try 5/8 socket with 13/16" hex end with 13/16"Ring spanner- baby steps-once loosened,wind out by hand or rubber hose over plug end, cold motor unless into pain!!lol number 6 is hardest!