I'm looking to replace my Borg Warner automatic with a Tremac 5-speed.on my 1964 S Type.
Has anyone done it? Is there a kit for doing the job?
P.S. I know I will have to aquire other clutch and pedal parts in edition to likely kit conversion parts.

 

Several member have done the conversion, myself included. I went the easy route and ordered a kit that includes everything you need (except; for the transmission mount under the car). The dedicated kits put the shifter in nearly the same place as a factory manual. The kit came with a new 4.2 flywheel, clutch kit, reverse light adaptor and bell housing. You will need to source a custom drive shaft. It was not cheap and I can't recommend the company (American Powertrain doing business as The Driven Man) due to their poor customer service.
Those more handy with a welder have made used Tremic T5 transmissions from other applications work.
Do a search in this forum. There is a lot of information.

 

"except for the transmission mount under the car"
What transmission mount did youuse?
"You will need a custom driveshaft"
At approximately what cost? Evidently not jusrt a matter of shortening/lengthening.

 

I have a friend in the Jaguar club who has all the toys. An afternoon with a plasma cutter, welder and drill press. I had created a pattern with Home Depot angle iron and bolts. We copied the dimensions.
My car was an automatic with a two piece drive shaft. I found a local drive shaft shop and gave them the longer of the two factory shafts. They reused the yokes on either end and built the middle with a slider. They also balanced and painted the shaft for me. I think it was around $300.
Watch the pinion angles with the one piece shaft. I had to fabricate new adjustable torque arms for the axle to body mounts. The details for this are elsewhere in this forum. I can't take credit for that.
With the adjustable torque arms I was able to pivot the differential back a little to get the pinion angles just right. Later I realized that the differential cover was making contact with the flange on the fuel tank so I had to wind it back a little to get clearance. My fuel tank may be mounted a little too far forward in the car. I'm going to try to bend the filler neck a little to get the tank to slide back. All I need is a quarter inch to give me enough clearance to adjust the axel back enough to restore my perfect pinion angles.
Hope this helps!