Hello Colin, have been watching the rebuild and am amazed at the attention to detail. Well done!!. Like a lot of us we are all itching to assist and wishing we lived closer. I read the last post in regards to the pistons.
I may be wrong and way off the mark here but I feel from the photos they look much the same as the Rolls Royce "B" series engine pistons. A few little differences as in the expansion grooves in the skirt etc.
Have just overhauled our "B60" out of the Humber and spotted enough similarities I believe to prompt me to make contact.
"B60"
Bore - 3.5 Inch (88.9mm)
Stroke - 4.5 inch (114.29mm)
Capacity - 259.78 cu. in. (4.25 Litres)
If they are close enough to wet your appetite I am willing to post a NOS (0.20 OS) and a Used Standard piston to you for comparison.
I also now the location of ample NOS - Standard - 0.010 OS and 0.020 OS piston sets a lot closer to you than Seymour.
It makes it easier seeing your block is sleeved the only maybe could be the piston Pin location and diameter.
Cheers,
Dave.
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1 x 1955 Austin Champ WN1(restored)
2 x 1956 Austin Champ WN1(restored)
1 x 1955 Humber 4 x 4 GS (restored)
1 x 1945 FMC 1/4 Ton Trailer (restored)
1 x 1942 Bantam 1/4 Ton Trailer (restored)
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