The guy who makes and sells LT-1 water pump drive seal tools has some for $6.00 right now (usually $25.00). This tool makes getting the oil seal on the timing cover on without tearing up the seal much easier. I just did this job and got it done by using various sockets to stretch the seal, but it was a pain. I ordered the tool today to use next time. This seal is the source of most oil leaks on LT1's.