The cast aluminum S-G intakes (for NDIX on Okrasa heads) are a bit chunkier than the steel ones used on the original kit with 32 PBIC. This is very noticeable during assembly.
This is what I had to do (so far) to fit them:
- Shorten the "overhang" from the mid-upper 25 hp head studs a few millimeters.
- Cut large holes in the cylinder tin on free-hand. (They now look OK assembled, I chose to fold in the sheet metal a bit for a nice snug fit)
- Use special M8 flange nuts with 10 mm external hex fitting (from Dalhems, Vessigebro).
- Grind in a few places on the intakes (they are thick, so it's no problem)
I'll keep you posted.