Originally Posted by cossie legend

I'm now ready to use my mk1 focus rs engine in a sierra. Due to health and family commitments it has lay many years but I'm now ready.
I want to keep price down and source used parts were possible.
I dont really have a BHP that I need but I'm guessing if its 300bhp it will keeps cost down a bit.
Some help is needed to help me understand what I need.
Can I use the mk1 frs flywheel and clutch? The clutch should be OK up to 300 bhp
is the mt75 the best gearbox for this engine and what modifications is needed?
Can I use the mk1 frs exhaust manifold or does the turbo need to go on top?
Would a used 4x4 intercooler be the cheapest option? Its suitable for up to 300bhp as well?
what bore of an exhaust is needed? Just any cosworth exhaust?
Can I use the mk1frs inlet and injectors?
Does 1.8 cvh engine mounts fit both sides?
Does a standard sierra radiator need upgrading to cosworth?
I'm on a budget but I want it to be professional.
I've read many questions asked but none that answer my questions properly?