Ok, I think I've read every link about this but I need reassurance before I drop $$. Need to replace to qr in my 04 spec. The only replacements I can find are Altima qr's. Will these p&p? I understand a few things need done like knock and cam/crank sensors also flywheel for the manual but other than that am I good? Will my spec ecu work with the altima engine? I want to make this painless and quick. Anything will help. Thanks.