Welcome to CHR. I'm new here also but have been building hot rods for 35 years, still learning I might add, For me alot of this stuff I know but just forgot, As for your project, I would check and double check it for square. If it ain't square it wont work, just like the others have said. It sounds like you've gotten a start but keep in mind that alot of front frame grafts were not done so good and you want to make sure you have a good SAFE foundation, you have a pretty heavy car there so be sure. Sometimes you can get a good swap meet frame for the price of trying to fix one that's been done poorly. I had a 47 Super Deluxe Coupe and it rode pretty good with the stock chassis and axles. I added a dropped front axle and panhard bar and tube shocks and disc brakes, it made a big difference. Good luck and keep us posted, this is a great site to learn from!!