So a few mods I do. Pic 1 is the reaction shaft support. This a 71 or newer wide bushing version. The oil feed hole to the front clutch has been widened. Its done with a used cut off wheel that's worn down to about 1 1/2 " diameter. Or the high end guys can mill it. This also gives a good shot of the reaction shaft ring grooves. They are square and smooth. this can be verified by inserting the ring in the groove and holding it up to the light. You also want to look inside and see where the input shaft rings ride. That area should be smooth as well. The 2nd pic is the OE front pump vent. Drill it with a R drill. Then tap for 1/8 pipe and plug with an Allen plug. I'll go into detail where to locate it in the next post. Pic 3 is what's left of the parking gear/governor support. All cut down to reduce weight. We did cut a new snap ring groove in the output shaft further forward to retain it. The last pic is the accumulator blocker rod. You can really use anything. A piece of rod, an old bolt. Just make sure its not to long that it holds the valve body up off the case.
Doug