If I buy a second ka engine (should I go all out on the mods?)

[Red]

So I found a 95 240sx (same year as mine) at a wrecker.... And there are a few parts I want if they are still there.... But now the question is.. when I buy another ka should I go all out on the engine mods? Get it built for MAX hp? But the thing is... If I do that I will need to drop the compression to 8.5:1 later on turbo.

Or should I just get it stock compression 9.5:1 and then after I get a turbo drop it to 8.5:1 ... I duno. I dont want the loss in power for however long it takes to get the turbo. But I think it will cost a bit of $$ to do it twice.