Jeff,
The 400,455 & 350 olds are always worth more to a restro/ muscle type guy.. Racers are paying somewhere between $ 50-150 for bare blocks depending on condition.
Best thing is to get on some Pontiac sites like ; Pontiac Street Performance /Restro Forum
Performace Years Online Forums (Pontiac ) ,
WWW.KREPOWER.COM (Look up links and you will find more sites ) ....... E-mail me @
daveribeiro@aol.com if you need more help....