Hard to tell. It looks like a pull through carb setup. Probably a GEN 1/2 SBC.
The exhaust port spacing could be for an LS, but isn't right for the SBC.
NordicSaab said:Hard to tell. It looks like a pull through carb setup. Probably a GEN 1/2 SBC.
Center Exhaust ports are not Siamesed, so not SBC.
Perhaps, Small block Ford?
Looking at it again... SBF is a possibility. Good catch on the non-siamesed ports. Looking at the piping and how it is configured and the lack of BOV/wastegates I would guess it came off an inboard boat. It could be a BBC/BBF
2 bolts per port definitely not LS. Most likely BBC with the shallow angle those bolts are staggered at. Small block ford exhaust manifold bolts are normally all in line and the exhaust port on a SBF is quite small. Some of the BBF did a weird W pattern with the manifold bolts. Given the popularity of BBC in inboard boats that's my bet.
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