Agree with above really.
A new crate engine isn't ridiculous money and very reliable or go for a small block chevy.
My mate will be selling his later this year for sensible money.
Runs low 10's on nitrous dragging a heavy old Corvette.
Rover V8's are far too weak tbh.
Speak to Danny from Adrenaline as he will be able to point you in the right direction with what to use