Bleeding brakes is a 2 person job, how did
you bleed them ??
The only other way is with a 1 man brake bleeder
which is a vacuume pump with a catch jar for the
fluid to go into.
You might have got some air into the system when
you opened up the "anti lock valve" (not sure what
you mean as 88s didn't have ABS)
When you bleed brakes, you need to start at the end
of the circuit and bleed till you see clean fluid (clear)
instead of yellow or dark color, that should do it.
Wild