C4 muffler eliminators

Hey guys,
I have an 84' corvette. I work in a fab shop as a welder and was wondering if anyone had the measurements and bend angles to make muffler eliminators? I can't see spending $200 on a set because I am pulling my motor this winter and putting an LT1 in, just wanted some more noise and better looks for this summer, if you could help out that would be great.

Thanks,