I bought a TTI setup for stock manifolds and it fit like total crap. The driver's side head pipe when bolted to the stock manifold was up against the transmission. I mean SMASHED up against the transmission. Since there's no way the stock 340 manifold/engine/727 could have been "misalligned", it was poor craftsmanship on their part. I called TTI and told them about it,and they said they make no mistakes and I was SOL if I couldn't make it work. If I had headers, I think that the rest of the system would have been adequate, but nowhere close to the quality it should have been for the price they charge.
I've never heard anything but good stuff from Tom at Accurate. I was originally planning on buying my stuff from him, but he told me that he doesn't make A Body H pipes anymore, and suggested I buy from TTI. I wish I hadn't. $600+ for a system I hate. For that price and their hype, I shouldn't have to modify a thing to make it fit. As far as I'm concerned, TTI sucks, theiur customer service sucks, and I'll let anyone I can know what I think of them.