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Rebuild Engine or Transmission First

Rebuild Engine First or Transmission?


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    3

71SandbugCharger

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The interior is well underway and it’s time to think of the next mini/major project. Should I start to rebuild and upgrade my 383 Engine or rebuild and upgrade my Torqueflight A-727?

I have books for both, and this forum for unlimited knowledge!
 
The interior is well underway and it’s time to think of the next mini/major project. Should I start to rebuild and upgrade my 383 Engine or rebuild and upgrade my Torqueflight A-727?

I have books for both, and this forum for unlimited knowledge!

A few questions. Are they both still in the vehicle or out? If out and you're not going to be driven til both are going through, it doesn't really matter. Is either one completely worn out or have major issues? If one is still functioning properly while the other isn't and you want to keep driving it, rebuild the one that needs it first. The motor is going to be 2-5x (or) more to build depending on your plans for it. What's your budget look like? GL.
 
The interior is well underway and it’s time to think of the next mini/major project. Should I start to rebuild and upgrade my 383 Engine or rebuild and upgrade my Torqueflight A-727?

I have books for both, and this forum for unlimited knowledge!

What is the time frame between building them and using them, and has the build for both been planned out?
I would say, rebuild the transmission first. It is easier to seal up for storage, unlikely to be damaged from storage, less space to store, less time and expense to build, the trans-gel and ATF used in assembly won't dry out or go bad in storage like some engine assembly lubes, and the parts/technology used are less likely to change.
With engines, there are new parts released much more often (although not that much with the 383) that may change what you use for pistons, rings, bearings, heads, intake, exhaust, cam, timing set, oil pump, carb/efi, oil pans, timing covers, valve covers, ignition system, cooling system...
There is also the issue of storing a newly rebuilt engine. Will the engine be fired up and break-in performed before storage, or will it be sitting with just the assembly lube on the parts? How long will it be sitting? Will it be stored with the rocker arms installed and some of the valves open? Are you using a flat tappet cam that might need valve springs changed for engine break-in (like dual springs?)
 
If you do not know what the final engine out put will be build it first then the trans. At about 450 hp trans parts will need an up grade.
 
Rebuild the 727 with an upgraded motor in mind.
 
Thanks for all the comments! I will do the transmission fist. The engine and transmission are both out of the car. The 383 was an exchange engine, and supposedly ready to run. i'm taking it apart anyways and when I see more inside I plan on boring out the cylinders, rings, changing the valve springs, cam, front end, manifold, timing chain, and so on.. The transmission was from the car and visually looks good. It has fluid in it. I plan on upgrading the transmission for increased HP.

For timing and budget: Working on a little every night and working during the day for the $$ to go to it!
 
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