Are the supplier's "v8 STYLE pressure plates" really for tractors?

[40 Deluxe]

Originally Posted by Kurt in NJ

I have a original Ford disc (v8)in my A, it was in the car when I got it 50 years ago, I took the picture when I was trying to get it unstuck, drove over 40 miles jerking it, still wouldn't pop loose, had the car bucking jumping on- off gas, then I learned that I could shift without grinding, that the starter did fine starting from a stop in gear, I tapped the hole in the picture , put a bolt in it and yanked, and it popped off the flywheel---- the original Ford disc doesn't have spring capture flanges, and neither in the box nos ones don't have them, perhaps the springs are better, the metal thicker than modern production --- in the era it was common to replace just the facings on old disc
Yes, I drove nearly all the 40 miles with my foot on the clutch and no change in crankshaft end play

The last sentence reminds me of reading some history of the home built Model A powered Pietenpol airplane of the '30's. Mr. Pietenpol (Bernard?) said that the stock thrust surface was just fine! Think about it: During take off and climb, and going into a headwind, you were at full throttle. All 40 HP were going to the propeller through that thin ring of Babbitt on the rear main!!