...I stumbled across this when I was looking for something else:

http://www.droldmobile.com/tributecar.html

"This is an effort to showcase performance bells and whistles that were used by Oldsmobile between 1957 and 1970.

 The front engine is a 1957 371 J-2 tri power  W1 NASCAR solid lifter motor with 315 h.p. The rear engine is a 1968 455 c.i. that has the ONLY 1967 L-69 W-30 tri power intake and a 1967 UHV  transistorized ignition.

The suspension is air ride. An option available in 1958-59 called New-Matic Suspension."