My boss has a 76 Landy with a 3.5 V8 in it running edelbroch manifolds Webbers and high performance cam, it is also custard yellow

It is such an awesome sound and was the snow mobile which took us all to work last winter.
If he gets 15mpg it of it he is a happy man

Nowt wrong with a tdi though, and in a landy or the like you dont mind sounding like a tractor

He was planning to put another 3.5 v8 in it which he has built in his workshop but came upon a 4.6 V8 from a 96 vogue, this will be fitted next month

He is hoping to get better economy by using the efi injection system from the donor car, trying to find out how to do this properly atm without throwing up fault codes or running in limp mode.
It looks entirely possible but space and electrics on a 76 landy are limited and rudimentary respectivley. Would be a shame to have to run carbs on it so currently looking for some input from a man in the know........