Thanks for all the info.
The block casting # on the 348 is. 3857655, suffix is. TI2I78G
Posting from my phone. Will be easier to research the numbers when I get home.
The pistons are Jahns power slot. 1138.
When I got the 348 I ran the casting numbers here and recall reading where that block casting was the only one with enough meat to bore out to 409 std size. I'll jot down the casting number and post it.
FWIW, the 348 ran a combine it's whole life in N. Texas.
For years I have been looking for a 409 motor. I have found overpriced truck motors and WAY overpriced real stuff.
A few months ago I answered an ad for 409 parts. The guy wasn't sure of what all he had cuz the parts were at the machine shop and he had to look at em first b4 he could figure a...