Yes it is possible but it would probably be out of the range of the average DIYourselfer...we will be doing this for our 90 LN3 the info I have so far is posted here near the bottom of pg 1
if you have decent mechanical ability and can have someone machine the intake spacers etc you could do it...
but if you have the ability to pull the engine and rewire/replace it with an L67 you may be able to do this.
we will be doing this this winter when the rear engine will be getting turbocharged on our twin engine 94 Olds Cutlass 442.
PSYCHOTIC GEARHEADS paying homage to a legend, Hairy Hurst Olds
The first twin V6 94 Oldsmobile 442 462ci-4wd-2 (twin) engines
13.81 @ over 98 MPH! consistent 1.90s 60'! 4330 lbs race weight
something Sinister is coming to Chitown....