It would be fairly expensive to change over to the 4200. Lets say they give you the motor.
Still buying:
Computer
Wire harness
Fuel system
Oil pan
Transmission
All accesories and brackets
Having to fab up:
Motor mounts
Better electrical system
Having to learn:
EFI programing
Not saying it would be bad to do. It's good to learn to fab and program something.
A nice running street 250 will put out 250-275 hp and as much tq. Probably more tq than the 4200. Probably more HP than the 4200 at a lower rpm.
The 4200 is still a more efficient engine, no doubt.
