I would suggest the OP get a 85-87 Super Sport to go along with his 1970. After that put the 1970 on a diet.
Just do a search here on C&V for Super Sport, read everything and pick and choose whatever is appealing.
__________________
1973 Schwinn Super Sport
1986 Schwinn Peloton
1976 Raleigh Super Course Mk II(for wife)
1983 Gitane Super Corsa
1991 Trek 750 Multitrack