[farleyd]

Hi to all, still discovering new things as i dismantle the engine. Now i am on the heads.

1)
While removing the valves, i noticed there were some washers under the spring seats. Is this what some call shims? To get stiffer springs?
Some had 4 washers, some had 5!
Any clue? Whats the stock config?
Anyhow, ill renew the springs with new ones.

2) Two valve guide bosses are craked. Should i have them welded and repaired (then keeping the original matching heads) OR should i use spare ones i have from the same year?

3) I am going RS specs minus the MFI. My heads are from 911S (35mm intake). RS specs are 36mm intake. How much of a miss is it to keep the intakes at 35mm???? Using E-cams.

Thanks!