Quote from: shelbydoug on November 30, 2023, 07:04:50 AM
While this subject is open, I have a few questions.
1) Is that oil filler cap what is expected on all '67 GT500's or do they vary?
2) The Cobra Lemans driver's side valve cover is machined for clearance to the master brake cylinder for clearance. Doesn't the CS Shelby cover need that also?
3) Does the heater hose routing vary according to emissions or non-emission GT500 applications? Where would you expect to see it on a non-emissions car?
Which cap are you asking about? The scalloped, "cookie cutter" cap on the drivers side valve cover was only used on the closed crankcase emissions/thermactor GT 500's(and '67 427 Fairlanes/Comets/Galaxies). They could be Autolite stamped or no script un-stamped.
The chrome, Autolite stamped cap on the intake fill tube in the first picture at the beginning of this thread, is typically the style expected for a later car. The earlier cars used the same style/shape cap that were stamped with the FoMoCo in an oval from my understanding. Others will know approximately when the phasing in occurred for the Autolite caps. I was also told that not all of them were chrome, and black painted variations of each type script cap were used sparingly throughout production. Again, maybe someone has a more definitive time frame of usage.
Something I've been wondering about is did some of the closed emission/thermactor GT500's use the oil fill tube cap and spark arrestor system pictured below if the regular, straight oil fill tube was used instead of the C4AZ-6763-A curved fill tube with the nipple on the side that Jeff posted a picture of. If so, then that opens up another whole batch of closed crankcase emission caps, scripts, finishes, shapes/sizes.