4 0 0 ▁GT ▁Mon za . ▁The ▁original ▁name ▁was ▁the ▁" 4 0 0 GT ▁N eri ▁and ▁Bon ac ini ," ▁but ▁the ▁final ▁name ▁Mon za ▁was ▁eventually ▁chosen ▁due ▁to ▁its ▁bre vity ▁and ▁ev ocation ▁of ▁racing ▁history . ▁The ▁al umin um ▁body ▁was ▁hand ▁built ▁in ▁the ▁N eri ▁and ▁Bon ac ini ▁shop ▁and ▁went ▁through ▁many ▁revis ions ▁during ▁the ▁fabric ation ▁process . ▁The ▁final ▁result ▁was ▁a ▁distinct ive ▁fast back , ▁with ▁a ▁long ▁h ood ▁and ▁K amm ▁tail . ▁The ▁design ers ▁integrated ▁a ▁roll ▁bar ▁into ▁the ▁extremely ▁thick ▁C - p ill ar , ▁possibly ▁increasing ▁roll - over ▁safety ▁but ▁comprom ising ▁rear ward ▁visibility . ▁Other ▁details ▁included ▁a ▁very ▁low ▁and ▁ra ked ▁wind sh ield , ▁prominent ▁but ▁non - function al ▁air ▁vent ▁gr illes ▁behind ▁the ▁front ▁whe els ▁and ▁st yl ized ▁" 4 0 0 ▁Mon za " ▁bad ging . ▁Over all , ▁the ▁design ▁shows ▁visual ▁similar ities ▁to ▁other ▁contemporary ▁Italian ▁sports ▁cars ▁such ▁as ▁the ▁B izz arr ini ▁ 5 3 0 0 ▁GT ▁and ▁the ▁Lamb org h ini ▁Mi ura . ▁ ▁Hom olog ation ▁problems ▁prevent ed ▁the ▁car ▁from ▁ever ▁racing ▁and ▁the ▁American ▁customer ▁who ▁commission ed ▁it ▁apparently ▁never ▁received ▁the ▁car . ▁It ▁was ▁instead ▁displayed ▁at ▁the ▁ 1 9 6 7 ▁Barcelona ▁Motor ▁Show ▁on ▁the ▁Lamb org h ini ▁im porter ▁Am ato