65 Coronet Big Block Swap

[landers62]

So, the car is a bench seat ride currently? My 65 500 started out with a bench. Then my friend put buckets in with the console. However, since it's a bench car not bucket, there were no reinforcement units on the back of the floor. Over time the floor developed tears/cracks in the sheetmetal because of the change. I took care of that while putting in frame connectors. I cut out half of the floor and did my own panels.

 

[dvw]

Hey, @dvw! I tried to DM you, regarding 1965 727, but your mail box is full.
Dave

I cant get it to empty. What do you need to know
Doug

 

[Dave6T4]

I cant get it to empty. What do you need to know
Doug

Have you ever worked on a 1965 727 that did not have a rear pump in it? Was there a running change in 1965 to eliminate the rear pump?

 

[dvw]

Have you ever worked on a 1965 727 that did not have a rear pump in it? Was there a running change in 1965 to eliminate the rear pump?

No, all Torqueflite untill 66 have a rear pump. You can eliminate it when using a manual valve body as it's primary function is to provide governor pressure.
Doug

 

[Dave6T4]

No, all Torqueflite untill 66 have a rear pump. You can eliminate it when using a manual valve body as it's primary function is to provide governor pressure.
Doug

Well, I have a good story for you. A friend of mine bought a nice running/driving 1963 Polara, with a 440 and 727 in it. These had been rebuilt shortly before he bought the car. His complaint was that the trans was slobbering fluid on his nice garage floor, and wondered if I could repair that. I identified some leakage sources, the main ones being the pan gasket and converter seal. I told my friend that the trans would have to come out of the car to repair all the leaks. Since the cable shifted trans had a slip yoke, I knew it was a 1965 unit.
In a short time, I had this 727 on my work bench. When I removed the pan, I noticed that this trans had the newer one-hole filter on it. I thought, "Here's trouble." . When I removed the filter, I noticed that the valve body lower plate only had one pump intake hole in it. I figured that someone had played "mix & match" with valve body parts, until I noticed a 1965 casting date on the valve body lower plate. I removed the valve body and disassembled it to clean it and add a slight shift kit. It looked like no one had this VB apart before. Since I was only doing a reseal, I did not disassemble the trans to see if there was an operational rear pump present. I put a new one-hole filter on the VB, and reassembled the 727. The rear extension housing was the early style that one would expect to see on cable-shift 727.
After the transmission was reinstalled in my friend's Dodge, we prepared to take it for a test drive. To my surprise, the transmission operated perfectly, automatically upshifting to each gear. The kickdown worked fine, as did manually shifting with the buttons. This is not my first rodeo, having rebuilt likely 150 727's and 904's over the last 40+ years. I have worked on other 1965 727's, and they have always had the 2-hole VB and filter. This one is a mystery to me!
Dave

 

[dvw]

Thats one I've never seen or heard of. Since the 66 valve body is completely different i don't know why there would've been a few month change over that would've required a whole lot of engineering for a part that would be only used a very short time. Obviously with one hole it wasn't using a rear pump. Since the governor support/rear pump for cable shift is completly different the a later trans that part would've been special as well. I'll see if I can ask Low Mancini. He worked in the trans lab at that time.
Doug

 

[Dave6T4]

Thanks Doug. I was amazed at what I was seeing, and agree there would have to be some special parts involved. If it had been a full rebuild and disassembly, I would have taken some pictures.
I don't know the history of the car. I assume the car was possibly built in U.S., because it is a Polara, a model that we did not have in Canada in 1963. Our Canadian top model was the 440 series. It was different than U.S. 440, in that it had Polara tail lights, and 1963 Plymouth dash and interior.

 

[ckessel]

View attachment 1976396View attachment 1976397

A roll or two of duct tape and you're set for cruising!