Building a motor for my 1990 K5, bought a "race prepped" block from a place in Michigan. Got the block but needed freeze plugs, cam bearings etc... Which are all done now. Only other thing it needed is the rear main seal "carrier". It's a 90 Vin K one piece rear style block. I found a carrier on Ebay but without a reference part, I am not sure if it will fit or not. Can anyone look at these and tell me if they will fit or not? 1) http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7950215084&ssPageName=STRK:MEWA:IT 2) http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7950961722&ssPageName=STRK:MEWA:IT Thanks!