Mike...Mike...Mike
I got a recommendation.......
Now that ya got a proper motor ... why not take that LS1 thingy and put it in the ute.

Like no-one will ever want to look under the ute bonnet, so it dont matter if it's not "correct".
The cobra however, thats a different story, it would go very well with that nice ford engine in it. Would look somewhat correct too.
On a serious note...those 347 fuel injected Tickford thingys go very well with the right diff ratio in the cobra. Pity there's not more around in the wreckers yards.
Congrats on the new ride mate
cheers