Atleast 400 hours. I had 160 hours into my swap, and i didnt even have the engine and transmission in yet. Hes swapped the interior and the IRS. Those swaps are time consuming, and VERY expensive.. i know, i was doing one with my last GT. His looks super clean, but i wouldnt waste my time with the cobra interior and IRS. My buddy did the same swap with his 88 Coupe.. but just the engine, trans and fuel system... that car was SUPER fast.. and it was stock.that things sweet! I would love to know how many hours went into that.