This is ongoing issue with any vehicle that could benefit from more HP, VX is not different.but how much do you expect the swap to cost? What engine / tranny are you using? What's the effect on the stock tod / computer / goodies, etc.? Is there a thread on this already?
I was considering V8 option after learning about Isuzu's vulnerable V6.
Since I have a stagnant mint 99VX and most of the means to do the job I decided to go for it. Right now I am porting heads on my LS1 aiming for 400-450HP. I will stay with beefier automatic xmission. Transaxles may stay stock till they snap. TOD needs to be revised since I don’t trust it with the higher torque. Computer and better dashboard will be from the V8 donor, Corvette. The front and the rear transaxles will come from a ½ ton 4x4 pickup truck if needed.
Estimated starting price tag $12,000. The final cost might be offset by the proceeds from sale of VX parts. This project will take at least two years.
The ultimate Mod!