Re: [AMC-list] T176

[Ken Ames <ameskg@xxxxxxxxx>]

Mine has the 2.73s also. I have a set of 3.31s from a Wagoneer and that was the
original plan to perk things up but the engine is getting tired already. Seems
kind of backwards to have the 2.72s as stock on 4speeds and the 3.31s as stock
on the automatics. The J120 has the stock 235/75-15s on it now that came with it. 
Didn't plan on rebuilding either engine - just check the bottom end and go.
The 4 litre doesn't have much more torque than the 258 (in new condition).

A carb and exhaust change on the 304 would give about 50% more horsepower than
the 258.

Ken


Quoting Frank Swygert <farna@xxxxxxx>:

> 
> Unless you're doing lots of heavy hauling with the truck the 176 will be fine
> behind a stock to mild 360. I wouldn't build a 304 because pistons are hard
> to find and it will cost the same to build as the 360. 
> 
> I bet the main problem with your J-10 is that same as mine -- geared to high.
> Mine has 2.73 gears. I run 215/75R15 tires so it will have a little pull.
> Tires much bigger in diameter (those are 27.7") will kill pulling power. I
> bet you have bigger ones to look better. I'd like to have a set of 3.31
> gears, but have a 75 J-10 with 3.54s. They will be a lot better, but will
> have to run a 30-31" tire or it will rev to high on the highway. A 29" tire
> with 3.31 gears would be better, 3.08s would be fine with the tires I have on
> now. Mine has over 100K on it also. Will eventually build a 4.0L block for
> it. 
> 
> "Z" in the engine day build code was either a 343/4V or 401/4V. The block
> casting number is indeed a 304. 
> 
> --------
> Date: Mon, 06 Jul 2009 12:49:09 -0600
> From: Ken Ames <ameskg@xxxxxxxxx>
> 
> I picked up a 304/176/300 combo from a CJ and was wondering about a V8
> conversion in my 85 J10 currently with 258 and 176. I also have a spare 360
> and
> so am debating which V8 would be the better choice. Poor old truck now has
> trouble with 10mph headwinds and too many hills call for 3rd gear. Seems to
> spend a lot of time at almost full throttle just trying to keep up with the
> traffic and evidence shows blowby with too much oil in the aircleaner.
> 304 has a 'Z' in the valve cover tag (104Z16) - is this a 401 tag or did AMC
> use
> the 'Z' on later 304 tags? I was expecting an 'H'. Block casting 3195527 -
> carb
> tag 0DM2J - B 9K 8 so I suspect it is a 1980 or 1981 setup.
> 
> -- 
> Frank Swygert
> Publisher, "American Motors Cars" 
> Magazine (AMC)
> For all AMC enthusiasts
> http://farna.home.att.net/AMC.html
> (free download available!)
> 
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