I have made the mistake of buying a block and rotating assy from Indy. They do not deliver what they have charged you for and then they lie and deny when you call them about the problem. They get your money and you are stuck. Avoid!
And that is a sweet Dana. Would look under my 68 fish with my 416/904.
That 550 HP stroker Mike is describing sounds like the blue motor he posted here about a couple of years ago. I was so impressed with the power I bought a set of heads, his lifters, and Hughes 1.6 rockers as well as the solid Lunait cam he used to upgrade my pump gas comp 292H/ported Eddy head 416. Still have not had it in a car but it is ready with a 11" PTC converter and fresh 904 (with kickdown on a VB that allows automatic or manual shifting).
Here it is:
http://www.forabodiesonly.com/mopar/showthread.php?t=189967