273 302 318 340 build

4spdragtop said

So another option.
I found a 1974 318.No heads or intake. Bore is .030 over, pistons have 4 valve reliefs. Seller sounds honest. It was in his Duster(340 car)
He didn't do the "work" on the engine but was told to only run it on 93 octane and was told it was approx 9.5 to one compression.
He is going to get measurements how deep in the hole and the bore.
It also has a "purple cam" 429/444

Opinions on this 318 vs the one I already bought (1985 date).
1985 318 I can keep/refresh and drop in my 84 Prospector.
Thanks for the input

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You say you found a 360? :D

I just about made up my mind that everything needs to run on 93 octane. No matter the compression ratio. The gas we get now days sucks.... sucks really bad. Talked to a self employed mechanic who has been doing mechanic work for like 50 years. He said he runs 93 in every engine he has... even his lawnmower and weed eater. My dodge ram likes the 93 better than the 87. However my Triumph Rocket III Roadster doesn't like 93 but likes 87... strange. I think the compression of the bike is 8.5. I do remember it is in the 8s. I'm sure there are other factors involved.