Hi,
I own toyota surf 2003 with dohc 2.7cc engine. Im planning to upgrade it with toyota V8 or V6 4.0 or more.
Im sharing some engines; experts please suggest the best engine for surf 4th gen. I want engine with power & good fuel consumption.
Source: Wikipedia.

Toyota V6 1GR-FE 4.OL
The*1GR-FE*is the 4.0*L (3956 cc) version, designed for longitudinal mounting in RWD and 4WD pickup applications. It has a 94*mm bore and a stroke of 95*mm. Output is 236*hp (176*kW) at 5200*rpm with 266*lb?ft (361*N?m) of torque at 4000*rpm on 87 octane, and 239*hp (178*kW) at 5200 rpm with 278*lb?ft (377*N?m) at 3700 rpm on 91 octane.


Toyota V8 3UZ-FE Engine 4.3L
4.3*L (4,292*cc or 261.9*cu*in)
Output is 216 to 224*kW (290 to 300*hp) at 5600*rpm with 441*N?m (325*lb?ft) of torque at 3400*rpm. It has an aluminum engine block and aluminum*DOHC*cylinder heads. It uses SEFI*fuel injection, has 4 valves per cylinder with*VVT-i.


Toyota V8 2UZ-FE engine 4.7L
4.7*L (4,664*cc or 284.6*cu*in)
Output varies by implementation, but one VVT-i variant produces 202*kW (271*hp) at 4800*rpm with 427*N?m (315*lbf?ft) of torque at 3400*rpm.


Toyota 1UZ-FE Engine 4.0L
4.0 L (3,969*cc or 242.2*cu*in)
In 1997, Toyota's*VVT-i variable valve timing technology*was introduced along with a further compression ratio increase to 10.5:1,[1]bumping power and torque to 216*kW (290*hp) and 407*N?m (300*lb?ft)
Waiting for experts advises please help urgently