How do you drive it (when you do so)
What are you gonna gain with the V8? Are you racing?
There's a lot more to converting to the V8 than many realize. If you don't have time for the car as is how are you gonna have time to pull it, get all the parts and do the swap? Exhaust, motor mounts, at a minimum, besides the engine and trans themselves. Then how "built up"of a v8? That ain't free either.
I could have V8 swapped my truck, easy enough. But I don't have the parts on hand that won't interchange between the/6 and the V8 so I built up (not as much as you have) another/6 that I had on hand. The $$ not spent on V8 parts (even just the ones needed to do the changeover) I figured would be better spent on building a better mousetrap so to speak out of the/6.... I'll know once the weather breaks whether I succeeded.