There is still parts you could use from the GP's. There is a weld in rear seat brace that can be cut out with a sawsall. There is a front brace that ties the frame together.Some GP's with a 301 had a air cleaner with one large air snorkel that I think looks a lot better than other factory air cleaners as well I think it would make a great dual snorkal air cleanerif you can pick up two.