hi , im new to all this rs stuff and ive always wanted one and just picked up a mk3 rs1600i with a turbo conversion anyway cut to the chase there are a few problems and wondering if anybody could help me out heres a list lol

1st i started getting a really loud tappety noise from the top of the engine and today a poof of blue smoke cum out nd its got really loud and im unsure weather its bottom end or not ???

2nd the person who i borght it of has put mark4 dash in and the fuell gauge doesnt work ?? mk4 clocks mk3 sender ??

3rd it also seems to have oil breathing difficulties and unsure of whats steps to take on this as well

any help is much appretiated

1 more thing is it easy to do a zvh conversion ??? and is it worth doing?

thanks again