i'm gonna answer that with a ''Hell no it won't matter, in fact, i think it'll make it breath better...... those headers were originally constructed to be as efficient as possible in the constrictions of the engine compartment they were designed for. any time you can change something to improve the flow, your doing yourself a favor.'' now someone come tell why i'm wrong.....
Do it Monte.
maybe side pipes?
or into drag borla type muffs right out the front fender well?