Crazy or Should I Switch my 72 lwb 4x4 for an 85 swb 4x4?

[avejoe]

Any thoughts on why I should/shouldn't switch from my 72 lwb GMC 4x4 to an 85 swb GMC 4x4?

85: air, good paint and body, interior nice, NO RUST!, stock, 127K miles, two tanks. Better than single digit mpg (I hope).

72: Fewer on the road, poster child for smog controls, poor brakes if you've been following my posts, moderate cab rust per California standards (mint back east I hear), needs body work/paint to make presentable. Gots 69-72 tow hooks and soon to have a tach dash.

Anybody know of any major gremlins in 85 trucks?

Financially, I think I could get around $3k for the 72. I would need that plus $1.5k to cover the 85. I think I would be $ ahead in 12 months though at the rate I'm putting $ into the 72.

Am I nuts or should I?