i used to have a 64 avanti that i built from the ground up i drove it for 2 years then had to sell it later i got a 63 longbed truck that i put 71 caddy suspension in front to rear also 71 caddy motor and trans the only problem i had was when i stepped on the gas the back end went all sideways it sure got tailgaters off my bumper thats one cool stude by the way is that your mechanic