I'm building up a 87 notch. It was originally a 4cyl. I'm going to put a 302 carbed setup in the car. I have converted the front suspension and rear end out of an 88GT. My question is which springs would be better? The ones from when it was a 4 cyl or the ones from my GT donor? Or a combintation of the two? I'm looking to have the best handling as far as driving. And I want to be able to put the biggest and widest tires on the car that is possible. Thanks.