It's definitely a car almost noone would suspect of being really fast and it's also a car you don't see on the roads very often anymore since most of 'em suffered BHG's between 60k and 120k miles tops just like the Supras and by then they were old enough that most owners gave up on 'em unfortunately...
A buddy's mother-in-law bought one new, when it got older she gave it to one of his brother-in-laws, it blew the head gasket, they "got it fixed", it kept blowing coolant hoses randomly for a few more years then started running bad, now I suspect the timing belt's stripped and the head gasket's screwed again because it was running hot at random and now it spins over but won't idle and they've lost interest because the a/c doesn't work so it's parked in their back yard where it's been sitting for several years... It's been tempting to try to get it from them so I can replace the head gasket and timing belt to get it back on the road but the paint's screwed, the velour interior's faded, the front corner lenses are broken, and I forget what else, and I've got too many projects already...
Just be sure you deal with the wimpy stock Cressida brakes to go with all that extra power because they aren't anywhere near as big as even the stock MkIII brakes at all but at least it's all wheel disc iirc.
I think the R154 would be a more affordable choice, would require a lot less work, and unless you're shooting for crazy high power it should hold up just fine with a good clutch. The V160 would be stronger but probably overkill.
Good luck with it!