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Any loan tied to your home is a mortgage - even if it is labeled a HELOC (Home Equity Line of Credit)
Right now there are lenders that will issue mortgages right away after your Bk discharge. The LTV is lower and the interest rate is higher. Check with mortgage brokers to see if they have these programs.
You are typically looking at around 65% LTV with a BK discharged less than 1 year. At the 1 year mark I've seen guidelines that will allow up to 75%. At the 2 year mark you can just go FHA assuming the loan amount would be within the county FHA loan limit.