There are not many choices out there at the moment. Only option you have is to find a low mileage stock block and install that. Built motors are not cheap and very few folks can do a quality rebuild.

Hi Spooler, I could use a bit of advice, if you're willing to give it. I'm running Aaron's C38R Rotrex kit in my 2014 w/ supporting mods. Tuned by Dynosty, 600whp. I had an overheating incident last summar & now my stock engine is significantly broken. Blue smoke out the pipes & the knocking under the engine sounds like a Peterbilt diesel. I definitely need a tear down, assessment & rebuild. I'm trying to plan a path forwards. I don't have any desire to go beyond 600-650 whp; def not trying to get into your league. I've spoken to Mark @ Mazworx. His only option is $17k for a stage 3 built motor, IF they can use my block/heads. If not, then add in the cost of that too. Plus $5-6k for MA to R&R engine, then $1200 for tune, etc., etc.. I'm sure you know this tune. Obviously that would work fine for my power levels, but it also seems like a bit of overkill. What i'd love to find is some option between a stock motor & Mazworx. I checked w/ Dynosty & they are not "currently" offering engine build services. Just wondering if you (1) have any advice, or (2) know of any good quality shops that might do a build that would suffice for my power level and perhaps be a bit cheaper than Mazworx. If necessary, I could handle the engine R&R here (Pittsburgh PA area), or could trailer the car somewhere & drop it off. Thanks in advance & no worries if you have no time for this. I will likely pose this same question on the forums, just thought I'd start w/ you first. Cheers! Chuck Rile