What would be a high and low figure to put together a motor like this..below is the info supplied in the ad.
For the power plant, 540 CI Dart Big M short deck block., Eagle 4340 forged crank 1.25 stroke. Crank has been double keyed for blower. Eagle H beam forged rods with upgraded L-19 rod bolts, JE Blower pistons,8.4:1 ratio, crane hydraulic roller cam,roller rockers with stud girdle, full roller motor. Cycloe billet timing cover with cam button adjustment. The heads are Pro Comp 360 with full cnc porting. I'm using a 4 inch super chiller with a 8.71 little field supercharger. 2 Blueprinted 750 holley carbs. Running 8 lbs of boost motor makes 870 hp.
Boat runs well over a 100 and gets there in a hurry. Handles extremely well for what the boat is. I have over 30k invested in motor.