The Stovebolt Site Forums The Shop Area Engine Shop 261 engine with a 700 R4 transmission

I have a 1st series 55 five window short bed. Please advise what I need to be aware of with this transmission. It's out of a 1990 S10. What drive column would be recommended. Also mounting the master break cylinder under the cab or on the fire wall. I prefer it out of the way under the cab. Can I servise it okay?

Hy RB55, I'm a little confused by your question, are you or have you just acquired the 261 and 700R4 and you are wondering what you will need to do to install it in your truck? Are the 261 and 700R4 already married? As to the brake master cylinder, if you are contemplating converting to a dual master cylinder, there are kits available to mount them in the stock location. Does your truck currently have an open driveshaft?

The engine has the stock three speed column shift. It has an open drive shaft.

3B I plan on going with a disc break conversion front and rear replacing the old pads. There are so many deals out there. Do I need to be aware of the top of the line or is there a basic kit available. I would like a solid good for your penny kit.

Hy RB55, to mount the 700R4 to the 261 will require an adapter, possibly a special flywheel and a starter, I believe there are kits available to do this. One factor in this swap that is often overlooked is the throttle pressure linkage for the transmission, the throttle pressure adjustment throughout the r.p.m. range is critical to the life of the transmission. I am not aware of a kit to operate the throttle pressure cable correctly for our inline six induction systems, but some research on your part may locate such a kit. Another factor is the current engine rear crossmember, it will have to be modified/lowered to allow the transmission clearance for installation, also a new crossmember to support the rear of the transmission may be required. I am assuming that you are going to convert to front disc brakes only, although the way it is written in your answer one could get the impression that you might be going the whole disc brake route. You will require the disc brake kit of course, you will also require a "combination valve" to separate the two systems and adjust the pressures to each system for the best braking balance. Most dual master cylinder kits available when converting to front disc brakes use Corvette master cylinders which are designed for full disc brakes, to use that type of master cylinder for a disc/drum setup you must use a 10 p.s.i. residual pressure valve in the rear brake system. Good luck with your project, hope that helps.

Yes it has an open drive shaft.

I'm not sure but the s-10 transmission may have a different bolt pattern than what is on the adapter for the 7ooR4 transmission. Yes you will need an adapter to bolt the transmission to a 261, they don't bolt together without the adapter.

Hi 3B. Sorry for taking so long for thanking you. Ive finally figured out the "My stuff"tab to get right to the questions I put out and being able to answer. I'm at a stand still. I want to go
go with discs all around yet the kits are expensive and really vary in price. is there a sight out there that will direct one to options of swaping? I met a gentleman that has a cool 1913 Model T pickup that he has swaped out everything you can think of on that truck yet from the outside you cant tell. He said i should swap out a rear end with discs brakes already there. He
went on and on. Some people are very knowlegeable and experienced this way. It could be a big savings if you I had some guidance.