I think you are probably right about that being for a Datsun L-24/26/28 series. Spent 10 years working in a shop that did a lot of Z-cars and that looks awful close.Looks like a Hilborn style injector for a 240 Datsun. Port location and layout seems damn close to me from the picture to being a L-24.
6 exhaust ports, all on the same side and in a row below the intake ports. The outer (last two) exhaust ports are below/outside of the #1 & #6 intake ports.Something that shares exhaust ports. Only room for 4. unless a crossflow head and the exhaust is on the other side.
The Datsun L-Series engines set track records on every track they raced on. In 1971, they entered the B-Sedan racing series two races late (two races behind in points) and still won the series. Pete Brock oversaw the racing program, John Caldwell built the engines, John Morton out-drove everyone in the 510 and 240z.These engines any good for a racing deal?
for some reason, L-20 rings a distant bell as a 4 cyl??? been a long long time...Definitely for a Datsun L Series 6 cylinder, such as the L-20A (not available in this country), L-24, L-26 & L-28. The manifold bolt pattern gives it away. Awesome engines. Having owned ten Datsun 510s myself, I've built my share of L Series engines.