Nice, that's about what I was thinking of, a line to trim to with a grinder. Another layout method is to use a compass and scribe the line directly on the part.

Here's yet another way to skin the cat.
PICTURE 1
PICTURE 2

Grigg



•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-