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I could not find anything searching. Anybody know of a sticky or a chart so I can calculate out the proper speedometer gear for an early 727? Ive changed out my rear gears and am running different height rear tires. I'm assuming the gears are the same fitment up to 1965. TIA, Lefty71

Not mine, and I know nothing about the item or seller. Just wanted to say, you won't see these every day; https://www.ebay.com/itm/125373433512

Kicking around looking for a good 413 bottom and stumbled across this; Chrysler 413 Twin Power Unit BigIron Auctions Not gonna do me any good, but it was a cool vid.

Thank you Joey and FBBO for allowing such a wealth of info to exist in one awesome place!!! Now, sadly to say, I've been here a while, but I still don't really know who does what around this place, lol. I know there are some working machinists here, and some very knowledgeable retired experts...

Just a point of curiousity, since I know they are'nt a high failure item anyway, but; Has anyone ever stacked up rear planetaries from a 70's 727 to compare with the newer four or six pinion planetaries from a later model, like a 46-7RHE or an 48RHE??? Are there physical size, width...

Because Bill76 asked about numbers for the heavy RB rods ( and because I have all these on hand at the moment ) I figured I would throw together a pictorial reference of the four different RB connecting rods I have seen come from the factory. From left to right; a typical LY rod; casting...

So, I'm wrapping a 383 build with some '915 heads and I wanted to pressure check, especially since this is a mix of parts never together before. I put my test on, and started to question what I should go to?? I figured 20# or so would be more than the cooling system would ever dish out, but...