I'm building a 1984 LTD 5.0 engine to install in a 1978 Mustang II chassis. The 1978 chassis didn't come with an engine or transmission. So I've been buying parts off Ebay. I purchased a billet aluminum power steering bracket and power steering pulley from CVF Racing on Ebay. The pulley is 20% smaller in diameter than the original pulley. Will this smaller pulley present problems with the 1978 Mustang II power steering? Will the smaller pulley increase pressure/flow or decrease? The engine is now 4 bbl, original crank pulley, with vee belts. No serpentine belts.