A modified, blown smaller engine with rpm limitations built to the power level of a "stock" unmodified larger engine. Which will be more reliable in the long run? Let your inner engineer work with the cost analysis. Driveline is moot. 904 small block uses same driveshaft as 904 /6. Sure you have the base cost of the trans for the V8 to add in, but are you going to pump up the power of the slanty and not address the trans?
About the brakes....
Are you folks really building up power and not upgrading your brakes? Sure it's nice to be faster than a Smart car, but you better be able to stop when that idiot ahead of you dynamites their brakes.
