Its a 4.6, I'm not sure what power is was making before as the carbs hadn't been properly set up for the engine when I got it, there wasn't even any airfilters or trumpets. I haven't had the fuel injection set up properly either yet as I have a cooling problem to solve first So to summarize no idea of power, torque or MPG for carbs or fuel injection
A 4.6 is a nice base to start from tho, we would of loved to use a 4.6 but it would mean running fuel injection and a cat. I was just looking at this westfield build
LINK and he,s got some good figures with a 4.6 running stage 3 heads / piper 285 cam / high compression pistons and a cat exhaust.
Very tempting to go that route if we move over to the EFI setup with stand alone ECU, will have to see if our local range rover bloke has any 4.6s laying around for a long term build project.
We hav,nt had any cooling problems using a pro alloy large rad, electric water pump and a 82 degree thermostat, sits nicely at 85 degrees as long as you bleed the cooling system propley.
Maybe it has a leaking liner or something as thats quite common i hear
Sam.