0 - 3 of 3 tags for SCD

We are implementing around 400 tables of the FSDLM (insurance extension).  Can anyone give insight into which table types in the FSDLM should be type 2?  Also what are the advantages/disadvantages of making all of them type 2 versus only some of them?

We have a 3NF model implemented in Teradata and I have a table of the following format :
Surrogate Key              Cust Id       Cust Name    X1        X2        X3           X4            Effective Start Date            Effective End Date

To implement SCD type II using Mload, we need to know the primary key of the data. A comparison with primary key on source with the corresponding target field will help us in understanding the data already exist or not in the target. Now the entire method can be done in two steps.