If interested, you can rebuild your ram assist. Corvettes used the same ram assist for a spell and you can buy rebuild kits from Ecklers. Here's a fantastic thread on the rebuild process with lots of pics:
http://67-72chevytrucks.com/vboard/s...d.php?t=253657
If not wanting to rebuild, I agree with what's said above, get everything from the same donor. Goodluck!