Sounds like an ongoing project you got there going .Did you measure that the V12 engine will fit under that 280Z bonnet unless you lift the chassis since you mention Zonda and transform it into a Zonda like a Kit car ,those are available to buy for $35000 US dollars already with M120 V12 or with 6 cyl camry engine for $22000 .
What ever the outcome ,make sure that when you ready the only thing you need 100% functioning in that project are the BRAKES , maybe ad a parachute as well ,plan B ,lol.
This car will fly once you finished it . :thumbsup::devil