I got a lead on 2 different 8/34's One is a 742 case and the other is a 489. Which or is both re buildable and which would be a better diff ? Cost wise, rebuilding if need be which would be the better choice ? Not familiar with the 8/34. Thanks.
The 741, 742, & 489 all require different gear sets due to the pinions so swapping the gear set from one of your 741s is not an option if that is what you are considering. There is an ongoing argument as to whether either the 742 or 489 housings is stronger. The 741 housing is the weakest of the three but is still no slouch. They hold up to a lot of hammering and for a street car that will not be launched with slicks will probably hold up very well.
Start with this info. http://www.bigblockdart.com/techpages/875axle.shtml
I'm going to purchase a new Strange Dana 60 once you put the figures together It's just as cheap if not cheaper to go this route rather than to buy and rebuild an 8 3/4 espically if your upgrading to big bolt pattern. Quoted $1820 no shipping charge from local Napa without brakes I'll be using disc brakes
I'm going to purchase a new Strange Dana 60 once you put the figures together It's just as cheap if not cheaper to go this route rather than to buy and rebuild an 8 3/4 espically if your upgrading to big bolt pattern. Quoted $1820 no shipping charge from local Napa without brakes I'll be using disc brakes
What, maybe a 12 second car? Why spend money on a case you don't need. Run the 741's you have and spend the money that you'd be wasting on a 489/742 case on anything worthwhile.
Find a sure grip to swap into any of the current 741 geared cases you have and run it. The 3.91's are a bunch of fun if you don't plan to freeway drive much with stock height tires.