Inliners International Forums General Discussion Engines GM 4 cylinders 151 153 181

With a 5 port head the lumps are a dirrect fit. I would use 1.84/ 1.6 for a moderate motor and 1.94/ 1.60 on a hot one.

The 5 port will perform very well.

The good 8 port comes with 1.84 intakes. The individual runners are a plus and will allow for a smoother running engine with better fuel distribution.

Either head will need custom headers and possibly a custom intake.

150-200 HP and 1500 lbs could be alot of fun to drive. Tom