FIRST SOUTHERN <FSFA> TO MAKE ACQUISITION First Southern Federal Savings and Loan Association said it has agreed in principle to acquire Horizon Financial Corp and Horizon Funding corp from <Victor Federal Savings and Loan Association> of Muskogee, Okla., for undisclosed terms. The company said the purchase is subject to approval of the boards of First Southern and Victor and regulatory agencies. Horizon Financial services mortgage loans and Horizon Funding is a wholesale loan purchasing operation. Horizon services 3.2 billion dlrs in mortgage loans.