I have a '68 Lotus Europa. The engine is from a Renault Fuego 1.6L turbo FI (A7L). The turbo is a Garrett model T3. The turbo housing is warn out and doen't spool until around 4,100 RPM. The engine is fitted with larger pistons which give it 1,647cc displacement. Is there a replacement turbo that would be appropriate for tbhis engine? Any suggestions? Thanks, Bator