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Not sure if this is the right place to ask, but I figured SBM engine builders might know an answer. I was on the phone with ISKY yesterday and we determined the 507 retainers are right for my springs. What they could not answer was "What is the difference in an ST and and STA?" The STA is, in...

I have 4 SBM cranks here and I do not have any way of knowing what they were used in. Is there a chart somewhere showing casting numbers or a way to ID them? 1 is marked 2658278. 1.8 crank register. 2.49 main 1 has a partial number, 46577 on the number 2 main counterweight. 1.5 crank register...

Since my slant is down for some machine work, I started back on my 273. I picked up some 302 castings a few years ago. I remember the seller telling me they were not cracked. But they are missing a couple of valves. Why I will find out. I am going to disassemble them and clean them. Where...

There was a tread recently about 273 blocks with areas cast on the drivers side to clear power steering or manual steering boxes. I can't find the tread anymore, but was there an answer about why they were cast that way? I don't see 318 or 340 blocks having that feature. I have a 65-69 cast...

Why do 273 2-bbl engines have double eyebrow valve reliefs?

I saw this at the Museum of American Speed in Lincoln NE. Not sure what it is or where it was used. It had a guys name written on the timing cover and Keith Black stickers on the valve covers. Any one have any info on the engine? Thanks fun police.

Does anyone know why the changes were made to the LD4B intakes? Which one was cast first, no MOPAR part number, or the MOPAR number. The differences I see for sure are the CARB Flange area and of course the MOPAR PN. Also I have 2 different versions, were there even more variations? Maybe it has...

I saw the post by a member about the prototype 273 intake and it got me wondering about rare 273 intakes. Does anyone know anything about this intake? It was a Hot Rod magazine article on hopping up a 273. Claimed only Dave Koffel had one running at the time. I think they were wanting to do it...

Thanks to cross_thread72 I now have a 273 Block. I have wanted to build a small block for a few years now, so I am going to slowly build a 273 with a few parts I have located along the way. Feel free to chime in with your ideas! The engine will run in the Colt after I get that going so it's a...

Fabo Family: I have a set of 273 pistons and rods. I have been told all 273's have 4 valve notches. My question is how do I tell high compression from low or standard compression? I don't have a 273 to install them in to check deck height. Any ideas? Is there a casting number inside the piston...

Can an expert tell me the correct color for a 1967 Barracuda 273 Commando engine? I think it was red. Thanks FABO!