They will fit with a bit of work. Mac was my value added line when I was in the business. The problem is that if you ever have to seperate the engine and transmission, they have to come off first. If you are using an automatic transmission, they tend to help it get really hot. You have to do some creative heat sheilding. If it is a gutted track car, this really isn't an issue. If it is a street driven car, it can become one. Don't forget that any header you choose is going to have to compete for space with your transmission connection accessories, crossmember, starter, subframe connectors, emergency brake cable, fuel and brake lines, emissions, etc. Long tubes are a great conversation piece, but if you are planning to use a stock long block, they aren't really going to make that much extra power or torque compared to a good set of mids or shorts. They look badass and the work well, but if you are south of 400 hp, you might want to cash that reality check about all the things that have to fill that space and the difference in cost between them, the connectivity with your exising exhaust, etc. I'm not trying to talk anyone out of long tubes. Just trying to make sure they think it through before the have to reengineer some other part of their ride because of the major purchase.