Torque specs for what part of the engine? standard answer: keep turning until it gets easy...
Go with the 350. depends on your budget, 305 should go pretty good
120-130hp
You may find at least the peak torque and some other info at the Wikipedia weblink below. It is not the torque curve but it is a start.
there is no such bike yz490 didn't start till 1982 and went on to 1990 before this it was a 465 ....
The 1982 Chevy 454 engine, part of the Chevrolet big block family, typically produced around 230 to 250 horsepower, depending on the specific configuration and emissions requirements. The horsepower rating can vary based on factors like the vehicle's application and any modifications made. This engine was known for its torque and performance, particularly in trucks and larger vehicles.
if your wanting to change the head the torque settings are as follows: Cylinder Head_______(1.8-2.0kg-m)[13.0-14.5ft-lb] FlyWheel___________(2.6-3.2kg-m)[18.8-23.1ft-lb]
tire psi
Depends on the engine
about 12 hp
Quoted at 95hp @9000rpm.
17
50:1