I'm not sure what it was built with ? I thought I was buying a 548 with hyd roller cam and crane rockers. Got it home to find its a 598 with a solid cam and Jessel rockers. It has a nitrous system on it but I've never used it.
Why don't they post some info ? I haven't heard anything from them since they posted they were going to be more technological like 5 months ago on here or Facebook.
http://www.riverdavesplace.com/forums/showthread.php?138721-Ultra-Custom-Boats-is-finally-technology-bound&highlight=Ultra