block Id

Mark Lewis · 01-07-2017, 01:47 PM

I have a sbc with the casting number 3914638. It has a TII30DF stamped on the pad at front of block. Book says the number is a 327, 4 in bore but it measures 3.875 like a 307. Numbers on front indicate a 1968 307. It is a big journal crank. Could this have been intended to be a 327 and instead is a thick 307? Has not been cleaned or sonic tested so I don't what that looks like. Let me know what you think.
Mark

01-07-2017, 01:47 PM	#1
Mark Lewis Member Join Date: Apr 2006 Posts: 344 Likes: 62 Liked 206 Times in 43 Posts	block Id I have a sbc with the casting number 3914638. It has a TII30DF stamped on the pad at front of block. Book says the number is a 327, 4 in bore but it measures 3.875 like a 307. Numbers on front indicate a 1968 307. It is a big journal crank. Could this have been intended to be a 327 and instead is a thick 307? Has not been cleaned or sonic tested so I don't what that looks like. Let me know what you think. Mark