Top end power isn’t always necessary in stage rallying. There are hardly straight linesJ. You also need low power to pull out from corners etc. Therefore I thought I’ll take number 2. three is fine too but 4?? That’s more for track racers isn’t?
Please explain more about the issues of the coil and seals.
Took this of MSA
Performance Camshaft, Stage II, 70-83 Z/ZX Non Turbo
Grind: 17033. Lift(In/Ex): .480/.480. Duration(In/Ex): 274/274. Characteristics: Good idle, power range 2000-6000 RPM. Great slalom grind, works well with stock carbs or triple Webers.
Performance Camshaft, Stage III, 70-83 Z/ZX Non Turbo
Grind: 17034. Lift(In/Ex): .460/.460. Duration(In/Ex): 270/280. Characteristics: Rougher idle, excellent performance. Pulls hard from 3000-6500 RPM.
Performance Camshaft, Stage IV, 70-83 Z/ZX Non Turbo
Grind: 17036. Lift(In/Ex): .495/.495. Duration(In/Ex): 290/290. Characteristics: Rough idle. Midrange and top end power cam for well setup car. Drag or track racing.