the wiring issue is common on those years, repaired several over the years.

 

Thanks. That is good to know. Could I put a heavier gauge wire in place of the red wire?

 

I ran 37s when I had 3.55s (ended up around 3.08 ratio). It was great for fuel economy on the freeway, but absolutely terrible around town. My engine would lug down in 1st. Swapped a guy straight across for axles with 4.10s, and now I can start it in 2nd if I want (37s and 4.10s even out to about 3.55 ratio) and it gets up and goes WAY faster. Talking to a guy tomorrow about finally getting a 5 speed to make up for the fuel consumption on the freeway...[/quote]

The running gear on my truck did better with the 38's than the 33's I had on it for a short time. Better fuel econ with the bigger tires. Engine ran about 2600 rpms at 55-60 mph with the 38's and was above 3000 rpms with the 33's. My speedo didn't work so I went by the tach. I thought about switching in a zf5 but said to myself Ill keep the 4 spd.

 

Yes Go up one size and then do a heater power relay mod right at the fan motor. I need to do an article on this, the power for all these fords goes thru the heater switch then blower speed is selected with grounds thru the resistor pack in the heater box, I relay the high ground ,and main power so it takes the load off the dash harness.

 

Ok. thanks. You are referring to the red/blue wire I spoke of in the earlier post? If so, how do I run the new wire? You wouldn't have a drawing or some pics of how its done?