Re: fenton headers into a 39-40
I have them on my '39 59 AB, but I got them from Patrick's about twenty years ago and think his may be "contoured" a little differently, but I did have to modify the dip stick.
The castings are pretty thick, so hopefully your grinding process will work. I dropped one accidentally during engine rebuild and broke off one of the flanges, but was able to repair it with brazing....cracks can be fixed.
Dick.
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