If you want to travel to Winnsboro La. i have 2 friends that do Chassis work. One of them has two 66 Nova's both tube cars, with SM/BLKs on gas no nitrous and with carbs. one runs 5. teens the other runs 5.40 all day long. The 5.40 car he has owned for over 25 yrs.
If intrested PM me and i'll put you in contact with them.
Zip.