All depends on the shop and if they use a rebuilt or used 730 it will be around 10 grand a lot of parts to gather up to do that conversion to generate more heat
40 hrs that flywheel for the 730 is well over 100 lbs just 1 big piece of iron there is a lot involved like changing the rear engine seal to a 2 way seal, building support brackets, reinforcing the bulk,shift tower,cables,cooler,drive shaft a lot of extra items Thinking about it now I don't believe I would do one for 10 grand furnishing the parts