F41 suspension under a Calais

[martin.ca]

Looking at the diagrams, other than the number of mounting bolts (to the frame) they're functionally identical. The Saginaw 800 was used on lots of cars, Olds 88's and Camaros included. How you can tell the fast-ratio from the others is a detail I'm not sure of.

http://www.hemmings.com/mus/stories/200 ... tips3.html

 

[DRIVEN]

You can bolt them in ('78-'88) but there is a change in the type of hose/fitting ends. So you either need to use adapter fittings or use the corresponding pump and hoses if you put a later box on an early car. IIRC the switch was in '82 or '83. Best way to tell if it's quick ratio is to count the turns lock-to-lock. Mine is between 2.25-2.5 turns. Originally most had an ink (paint) stamped letter code on the end but usually that goes away over time with cleaning and age.

 

[DRIVEN]

One more thing; The pitman arm is different between the 605 and 800. So make sure you get that too if you're doing a swap.

 

[Evan11]

Thanks for the info on that.

 

[Csilvy2000]

Good information in here. Thanks.

One more thing. My understanding is the 800 series box can be found under a jeep grand Cherokee. Are the majority of these boxes gonna be quick ratio?

I swapped a manual box under my supreme. The ratio must be something like 22:1. I like the idea of the drag car engine running just an alternator.

Grand Cherokees are all over the boneyards and it would be the quickest and easiest source of a quick ratio box.