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Tx Firefighter · 07-20-2003, 11:15 PM

TH350s were made with 6,9, and 12 inch tailhousings.

All the trucks I've ever had came stockwith a 6 inch version.

The 9 incher is the one that is the same as 700r4 in overall length, so they are sought after to replace crapped out 700s by cheap folks.

12 incher was used is some vans and stationwagons.

If you run a 9 inch version TH350 on a 67-72 shortbed, you can get a used driveshaft that is already the right length and do away with the old 2 piece unit from

1. a 67-72 short bed 3 speed 6 cyl truck
2. an early 80s model short bed 700r4 truck

I put my small block on correct small block mounts and used a 9 inch 350. I was able to use the stock 6 cyl 3 spd one piece driveshaft. Later, I replaced the TH350 with a 700r4 and reused the same shaft. My trans guy charges the same to build me a TH350, no matter what length, so I used the 9 and saved money on having a driveshaft built. I'm cheap, and my truck originally was a 6 cyl 3 spd so I had the shaft laying around.

07-20-2003, 11:15 PM	#7
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	TH350s were made with 6,9, and 12 inch tailhousings. All the trucks I've ever had came stockwith a 6 inch version. The 9 incher is the one that is the same as 700r4 in overall length, so they are sought after to replace crapped out 700s by cheap folks. 12 incher was used is some vans and stationwagons. If you run a 9 inch version TH350 on a 67-72 shortbed, you can get a used driveshaft that is already the right length and do away with the old 2 piece unit from 1. a 67-72 short bed 3 speed 6 cyl truck 2. an early 80s model short bed 700r4 truck I put my small block on correct small block mounts and used a 9 inch 350. I was able to use the stock 6 cyl 3 spd one piece driveshaft. Later, I replaced the TH350 with a 700r4 and reused the same shaft. My trans guy charges the same to build me a TH350, no matter what length, so I used the 9 and saved money on having a driveshaft built. I'm cheap, and my truck originally was a 6 cyl 3 spd so I had the shaft laying around.