The Stovebolt Site Forums The Shop Area Engine Shop I6 250

I have a inline 250/th350 in my 67 chevy truck c10. It came out of another 67 chevy truck that originally had manual transmission. So my question is where to I find the kickdown/tv cable BRACKets? I have a rochester type b single barrel carb. No luck in any of the salvage yards.
[IMG]http://i807.photobucket.com/albums/yy354/50buick/2012-05-1311_14_00.jpg[/IMG]

Sorry no help yet.

Have you visited the 67-72 Chevy site ?? Someone there may be able to help.

Good luck.

You could place an ad in the Parts wanted forum here.

Frank50 nailed it.

250 TV CABLE

Look in the salvage yard on SBCs in cars like Buick, Olds, & Pontiac where the TH350 was also used. You'll have to modify what ever you find, unless you run across a 250 in one of those cars.
I have occasionally seen a 67-72 C series with the 250/350 combo, but their pretty rare around here. That cable on the other board is for a 2004R NOT a TH350. They MAY set up a little differently.

best wishes,

Les

Thanks frank50 I have been a member on there for a couple years now. Its another great chevy site. Mostly everyone said to keep hitting up the junkyards but those $2 everytime ad up and I am on a low budget build but what really is now a days. I may have a lead on one. Just waiting for feedback. I will try the wanted ad as well.

Lokar makes cut to fit universal knick down cables.

Yea but before I can get the kickdown cable I need all the brackets. I have a inline 250 and they dont seem to carry brackets anywhere. Been searching High and low. A guy in san diego has nova parts which he always has a I6 250 that may have the brackets I am looking for. I am hoping I found what I need. Keep in mind this inline i have is setup with a Rochester type B single barrel carb. the 2 barrel carbs wont work is what I been told on other sites.

The salvage yards around here are great at finding things for you. Try finding one in your area that will do a national search for you and see what they charge to have it shipped.

Are you sure the T350 was ever installed with a Model B carb engine? All the ones I have ever seen use throttle cables, not throttle rods. They also use a bell crank to operate both cables.

I believe you are searching for a part that never was.

The T350 came into production in 1969, before that, the power glide was used. The Mono-jet was replacing the Model B about the same time ('68 on up). You need to look at 1969 to 1974 or '75 GM (Pontiac, Olds, & Buick) a-body, Vegas, and trucks, as they all used the inline 6 with T350 transmissions. Even if you find the brackets, you will need the linkage, intake, and carb to use it.

Joe

Yea this is all new to me. I have always had a sbc350. When I bought this truck I didnt have anything in it. The spid sheet matches all numbers to my vin on cab and frame and says it had a 292/ manual trans overdrive. I bought a th350 rebuilt and recently purchased the inline 250 which I helped the guy pull it out of his 67 chevy truck. I have not seen anyone with the same setup as mine. I might have to change the carb,manifold. I do have the cable for the th350 but just nowhere. I really do not want to have to change my carb out. Bummer.

The only function the cable serves on a 350 is for kickdown. It will shift up and down correctly without any problems with the cable disconnected. If you simply must have a forced downshift, rig a cable setup that gets pulled tight just as full throttle is reached, or use a push button switch on the shift handle and a starter solenoid to yank the cable.
Jerry

I have the tv cable on the th350 I just do not have the brackets. I would like the transmission to work correctly on its own if possible. Instead of having to do it manually somehow but if thats what I have to do then i will figure something out. We will see what happens.

My trany shop tells me that a quick way to burn up a TH350 is to run it without the cable connected.
They say the cable adjusts internal clutch pressures as well as kick down.

They've got the 350 confused with a 250. I started rebuilding them in the mid-1970's, taught the system for years, and have seen bunches of the 350's run without a kickdown cable with no problems. Since the cable bellcrank doesn't even touch the internal linkage until full throttle is reached, I feel the need to call BS on your transmission builder's claims. The vacuum modulator controls the shift points, not the kickdown cable. I can provide the hydraulic routing diagrams to prove it if necessary.
Jerry

I to call BS, its only for kick down! I have been running mine over 12 years with out one, dad used his the same way for years. It shifts just fine with out it. I manually down shift mine if needed, and thats not very often, mostly when horsing around. The 250 has enough torque to pull my truck with out shifting down.

It wouldn't be that hard to run the cable into the firewall and have the lever from the foot feed pull it. Hook it up just like a throttle cable just below your throttle rod. The cable has a adjuster on it so set it for full pull when the foot feed hits the floor. You can then use your same set up you have now, all it would need is a small washer welded to the foot feed lever and a 1/2" square hole cut in the fire wall.

Joe

Joe H cool thanks. If worse comes to not finding the right brackets I will do that. On the highways I only plan on driving at around 60mph-65 mabye 70mph but even now i drive very slow in a 89 toyota 4runner 4cyl. hhaa. I just want to be able to get on the freeways here in Orange county,ca. People here just do not let you on the freeway ramps. They drive like theres no tomorrow.

Just moving the shifter handle to the "2" position, one notch to the right of Drive, does the same thing as moving the kickdown cable. The only difference internally is that the front band doesn't apply. That one only works in the forced 3-2 downshift mode. It adds a bit of strength to the 2nd. gear postion to handle full throttle torque.
Jerry