Lgarretto

Hi I just got onto this forum because I recently acquired a 1971 240z roller with no engine or transmission and I would like to ask some of you folks about possible engine and tranny swaps. I realize this question has probably been posed a number of times, I just wanted to ask it specific to me. As far as the transmission honestly other than a 5 speed manual I really don't have too much preference so I don't really need ideas there actually, but I'd like some input on engines if y'all don't mind. There are a handful of things I'd like out of whatever engine I choose for the swap. I realize that I probably won't get them all but I'd like to get as many as I could. 1) I'd like a small, preferably high revving engine. Likely sub 3.0 liter but I'm open to larger. I like the sound and feel (and most importantly how the car is driven) of smaller, higher revving engines. 2)reliability is big 3)enough aftermarket support that I don't have to fabricate everything 4)ability to get a crate engine is a big plus to me. (Or at least a professionally rebuilt one) 5)being that I'd like to make this into a track day/street car, my power output goal is somewhere around 400 plus horsepower 6) I know it's fairly far fetched for a small engine, but I'd like to stay away from too much internal work on the engine. A little is unavoidable I'm sure, but it would be nice. If it helps, some of the engines I've been considering: l28, rb25det, sr20det, f20c, ej20, 1uz-fe, 4a-gze I own a 6 port 13-b that I took out of a totaled rx8 I had, but I really don't want to use a rotary because they aren't particularly reliable and performance is difficult to acquire because of so much having to be fabricated custom. Thanks, I appreciate any input or thought anyone happens to have Logan