I drove GM intermediates with 200 &2004r,s
for many years. It seemed like about 75-100
k miles is what I got out of them. The 7004r
is a better choice. I had a63 1/2 ton with
one & it was agreat driver. I will put one
in the 70 I,m driveing now soon. It is an easy
swap & there are ways of dealing with converter
lock up.