maeagain is exactly right..... centering is a real problem.

Plus, older vehicles had the engine installed behind the front axle while the S10 and other late model vehicles had the engine installed over or much closer to the front axle...... This puts the radiator way too far forward to look right. If you eyeball an older Ford, the radiator is approximately over the front axle....

like meagain says, perhaps it is easier to build a rectangular tube frame...... it certainly will look "righter"