70 chevelle auto to 4sd crossmember

[70 ls6 convert]

Hi thanks for the info,my convert is an auto,im working on my ls5 hardtop 4sp car,but when i bought it in 1987 the owner of the car couldent keep a 4sd in there, so he put a 400 auto and just left the pedals in the car,i just ordered a new hurst linkage from year one,but i have a question about the seat ,i think its a bench seat car because it doesnt have factory looking seat holes on the inside by the tunnel,i almost had a heart attack last week my buddie thought he found the build sheet in the back seat but it appears to be a strip of paperwith numbers in between the seat and frame,looks like i have to pull the seat appart to get it out,i can see the first line it says car and load number,thanks for the info kris..