Mainly I was looking for a little better fuel economy on trips and in town
895 for the kit or send my controls in for 595.
Let's do the math...
You want to save fuel, and that's all cool but let's see the real cost.
Let's say you buy the $600 kit... and then buy a rebuilt trans. What do you think? $2000 all in? Maybe that's optimistic. I'm betting closer to $3k by the time everything is done, buying mounts and adding up all the "nickle and dime" stuff.
So.... Let's say you drive that Imperial about 10K miles a year. I think that's a lot, but you are in better weather year round than I am.
Let's get optimistic again and say you are going to get 20% better mileage. Probably not near that.... but whatever... and the car now gets 13MPG. A 20% increase in gas mileage gets you to 15.6 MPG.
I paid $5.25 the other day for ethanol free gas, so we'll use those numbers. 10k miles at 13MPG equals $769 spent on gas. 10k miles at 15.6 MPG equals $641 spent on gas for a $128 savings per year for gas.
So, using really optimistic numbers for gas mileage increase (20%) and optimistic numbers for the cost ($2000), it will take 15.6 years at 10k miles a year to break even even at $5.25 per gallon.
If you used some less optimistic, but more "real world" numbers of 10% mileage increase with $3000 cost, now you have 14.3 MPG and $699 cost per year so saving $70 per year. Do the math on that and it's 42.8 years before you break even.
If you only drive the Imperial 5k miles a year, double that time to break even. If gas prices go down, the savings will take longer.
This is the argument I give whenever I hear "increase fuel mileage" as a reason to throw wads of money at a car.