Depends on your budget and what you want from the car really
The problem you will encounter with throttle bodies on a standard 8v engine is that as the heads are counterflow you will have clearance issues and airflow issues as the bodies will be at the rear of the engine and directly above the exhaust manifold
Simplest options are
1/ if you want to remain 8v fit a 2.0 bottom end, p&p head and cam
2/ convert to a 16v from a mk3