i have a question. with a f23 can you switch the head from a h23 and change the engine to DOHC? or are the sizes and mechanics so incredibly different that i sound like an idiot for asking? and is there a way to increase compression on a f23 to produce greater HP output like an h22 or h23? such as maybe longer connecting rods etc? and is it more difficult than its worth to try to up the compression on an f23 for greater HP output and i just go for turbo and take advantage of the low compression ratio? just dont want turbo lag.