Lazarus,
One other option, that I and several others have gone with to get more speed but not break the bank or make a lot more work, is a Dennan overdrive.
Do a search on the two forums and you will see a lot of info on it.
It basically allows me to have a "5th gear". I retain my 5.83 diffs so have low end power with the stock flathead, but when I get up to speed, it drops the RPM's by about 500. I also retained the 9X16 tires. I can drive 50 without the engine totally screaming.
Also it can be removed in about 2 hours if necessary, if you want to go on a rock crawl, etc, and are concerned about damaging the unit.
As to power, I pulled my 2001 CTD Dodge pickup out of a ditch with the overdrive equipped PW. The 2001 weighs 7,000#.
The unit cost me about $1200, and the only thing you have to supply is to buy another driveshaft and have it shortened (unless you modify the original).
If you go to the expense and trouble of an engine and tranny swap, then you don't need this overdrive.
The only drawback is that the man who builds these up is retired so there is a wait time in getting one.
One other option, that I and several others have gone with to get more speed but not break the bank or make a lot more work, is a Dennan overdrive.
Do a search on the two forums and you will see a lot of info on it.
It basically allows me to have a "5th gear". I retain my 5.83 diffs so have low end power with the stock flathead, but when I get up to speed, it drops the RPM's by about 500. I also retained the 9X16 tires. I can drive 50 without the engine totally screaming.
Also it can be removed in about 2 hours if necessary, if you want to go on a rock crawl, etc, and are concerned about damaging the unit.
As to power, I pulled my 2001 CTD Dodge pickup out of a ditch with the overdrive equipped PW. The 2001 weighs 7,000#.
The unit cost me about $1200, and the only thing you have to supply is to buy another driveshaft and have it shortened (unless you modify the original).
If you go to the expense and trouble of an engine and tranny swap, then you don't need this overdrive.
The only drawback is that the man who builds these up is retired so there is a wait time in getting one.
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