I see its an old post but Bailes1992 would be nice to see how you got on as I'll be doing the same... Thats right 1.7 puma into my mk1 focus.

Why not a 2ltr or rs/st.... but I never take the easy route,

Firstly the puma came to me for free lol

also not bad spec's on it
1.7 puma is Variable Cam Timing Engine is 155 psi
LMS180 spec inlet
Inlet fitting kit
LMS stage two fully ported head
LM3 cams
Compression ratio raised to 10.9.1
Modified pocket Standard Pistons
LMS spec up-rated valve springs
Heavy Duty Rod Bolts
Panel filter
Power boost valve
Modified Induction System
Silicon Induction pipe
330cc Injectors
Vernier exhaust pulley
58mm knife edged throttle body

But would be grate to hear how the wring went or if anyone as done this before