Daft Questions from a Newbie.

[Enoch]

Hi Folks, Just found this forum so thought I would join in the merriment.
I built a Robin Hood Project 2B a few years back and have owned Ron Champion's book since the first edition came out. I have now got to a stage in my life where I feel the need to risk life and limb by building another car. I can weld and fix stuff, I am an electronic engineer by trade, the last build went well so I feel stupidly confident.
Now then, what I need to decide is what donor car to go for. I would prefer a Zetec motor but understand that if I go that route the injection and ignition needs money thrown at it. My 2b had a pinto but that needed loads spent to make it exciting, it was a heavy beast, I want something different this time.
I am thinking of going for a later DOHC sierra but know nothing about them, or maybe a CVH (?) variant.
I want to keep costs down so Mrs Enoch doesn't try to kill me. Again.
Anybody got any thoughts on what I should be looking for?
Thanks in advance,
Enoch.