good to know about the speed limits.
currently i have a 742 cased 3.23 sure grip in it. i have another 742 cased sure grip with 2.76's but i think that one needs bearings. i also have a sure-grip 486 case with 3.23's. i may sell/trade it raise the money to rebuild the 2.76's.
as it sits the truck will do any reasonable speed with the 3.23's - i can cruise 70+ @ about 2800 to 3200 RPMs and pull down around 10.5 MPGs on 89 octane and not get any spark knock.
Mopar Nats is right around the corner - i am starting to get excited and nervous about the trip all at the same time. we'll see how well my wrenching skills hold up with this trip
------------
1964 Dodge D100 426SW High Performance Package
www.cssregistry.com