Up until this last weekend...I had only run Hooker fenderwell headers on both race cars and street cars with BBs installed. Jumped off the deep end last week and installed a set of TTIs under chassis headers on a low deck in a 74 stock suspension Duster. Positives: things are a work of art, fit perfectly, did not have to dent one tube, good access to header bolts and ok access to Eddy headed angle plugs, are they tight...oh yeah...putting them on was a symphony of things that had to all happen at once, in order, install trans and converter, lay headers in engine comp, lower eng, lay starter on headers, lower engine some more, arrange headers and starter to fit between steering/suspension/engine/inner fenders as you continue to lower engine, bolt up trans and converter, install starter nose in trans, snug headers to heads, bolt up starter, bolt up headers... Perfect...lol, oh yeah, mini starter is quite trapped, starter change, if needed will be an adventure but honestly isn't that true with most headers? Since it is a full time street car we wanted "cleaner" looking exhaust...so we'll see how it goes.