There are better cams available today than ol' 286...try camtech range.
Factory cast heads with 2.02 valves & mild portwork or just cleaned up will do the trick.
If it were mine I'd have gone easier 355,10.5-11:1 cr,maybe f280 or tighter camtech recomendation,clean up cast heads with larger valves & come single plane.3.7 gears...streetable weekender combo that'd make mince meat out of a t5.
383 is nice to have just means more coin & a lot more labour involved.
Are you putting all parts together or engine builder giving you list of parts?