I don't know if this would work in the 64 but this is a cruise control stalk that I found for use in my 68. It is available for $30 from
http://store.fastcommerce.com/bought4less/home.html
I emailed Speartech about the MAF and O2 sensors and this was their reply.
"The 06 GTO MAF will work great. You will need the Corvette O2 sensors though. Any year should be fine (05-08)."