New 403 owner

[Hydroglen]

You don't say how much work the car needs. If it is very nice and missing
the engine and gearbox, it may boil down to spending a fair amount to buy
a Bristol engine or converting to another engine.
Check the prices of a decent 403 and then do the math to see how much it
would cost to make yours comparable.
That will not require mechanical skills and will yield interesting
information. Knowledge is power!!
Cheers
Dorien