I have been working on a project that I started about 6 years ago. Never let it be said that I am in a hurry. It is a 1982 Toyota SR5 pickup 4X4. I picked up a 1981 engine and rebuilt it with Silolite pistons, Hastings rings, Clevite bearings. Comp Cams Magnum cam, Offenhauser 4bbl dual plane manifold, Headman header, Toyota oil pump and double row timing chain. I also built up a Holley 450 4bbl carb for the project. The carb came off of a Mustang engine, from what I understood.
The whole reason for bringing this up is the lack of information on 4bbl carbs on 22r's. Some may even say that this simply will not work or is not worth wile. Because of this I had serious doubts this carb would not work at all. The initial start up settings are as such, the main jets are stock but new, the secondary spring is the white one, the idle mixture needles were screwed in to the seats and backed off 1.5 revolutions. I started the engine for the first time Sunday 10/18/09 and she fell back to idle with no adjustments. I set the idle mixture screws about .5 revolutions from the seat. The engine was a bit sluggish from idle to wide open. This was due to a misadjusted accelerator pump. After setting the pump the engine wraps up very crisply. I installed a vacuum gauge and am reading 24 Hg at idle.
I still have to set the power valve but with the above vacuum reading I feel that I will do this after I get the truck on the road and take vacuum readings then. I still need to install the exhaust; I will be welding it this weekend. I also have these things to do, install brake master cylinder, install new 4.88 gears to the axles, 33" tires, a throttle cable, new cab seat, a paint job, and vinyl floor. Oh yea, and a flat bed. I will give the specs on the main jets after I install the power valve, I simply forgot what they are and do not want to pull the float covers more than needed.
My motivation has changed, my wife said that it must be done; she does not care what it cost. You got to love that.
I did not build this to look pretty just a little more power. This is what the engine looks like today.

 

Not much done lately. I built the exhaust from 2 inch emt. I have found it to be just about the same size as the 2.25 inch exhaust pipe. No bending was needed because I used the emt 90's to make any change in direction. It took me about 6 hours to build. I am using a Hooker Aerochamber muffler.
Here are the pics.
The bell housing has oil all over it from a spill I made.

From the Headman header.


Back to the muffler. The white stuff on the muffler is from the box that the muffler came in. Yes I need to clean that off.


The muffler and the exit pipe. This took most of the bends as I had to go from the outlet of the muffler, around the shock and out from between the frame and rear left leaf spring.


I came across a Holley 390 cfm carb pretty cheap. It needs to be rebuilt. I will be experimenting with both carbs.

 

How much HP/Torque over stock?

 

At this time I do not know. The truck is running but I do not have a seat in it or have it registered. I still need to install a set of 4.88 gears and 33 inch tires. I am in the process of building a flatbed for the truck. And last will be the interior and paint.
I am building a copy of Joe Chacon's flat bed. It should look close to this when done.