10-02-2021, 12:48 PM
I'd only consider a stitch repair on the water jacket if the block was worth it and agree with Zeto about top cracks.
Have just checked 3 original Austin heads,All accept a 11/32" drill (8.7mm) through the stud holes so would assume Austin considered that a sensible clearance in use. Going much tighter is likely to cause more problems on removal ,CI or alum head over a long period of time.
Have just checked 3 original Austin heads,All accept a 11/32" drill (8.7mm) through the stud holes so would assume Austin considered that a sensible clearance in use. Going much tighter is likely to cause more problems on removal ,CI or alum head over a long period of time.