Reliable 150 HP as a daily driver using A series in an 800kg ute.
You can make it reliable(just)for big money,but it wil be an absolute piece of crap to drive on the road,you will have nothing under 3-4 thousand RPM and you will be changing gears at around 8-9 RPM+ with back tyres lighting up just before the cops nail you and cart your pride and joy off to the pound.
If you have not done one already,do an advanced driving course,once completed do some track days with proffesional teachers to learn how to handle the new power to weight ratio comparable to a Porsche GT3 but without the brakes and handling.

I offer my advise based on experiance and competition results over many many years,it's here to take or leave