Can a 340 head be used on a 318?
They explicitly said valve to bore interference is not a problem even for 2.08″ valves on a 318. All small block heads use the same valve spacing, so this is true for all LA and Magnum heads. Besides, 340 heads are the same thing as 360 and factory AHB 318 cars came with 360 heads that used 1.88″ intake valves.
What’s the difference between a 318 and a 360?
Therefore you can not swap vibration damper, flywheel, or torque converters between them. 360 uses larger bearings and crankshaft journals. 360 has one motor mount in different location (as the other poster mentioned). 340-360 heads have larger ports and valves than 318. Different camshaft profiles, but you can fit any camshaft in any engine.
What kind of HP gains can you get from 340 heads?
Let’s talk about 340 heads. I was wondering what kind of hp gains a person could pick up by bolting on a set of w2 heads vs a set of let’s say j heads. Would you see any gain or would a cam change be in order to get maximum hp out of the setup.
Can you run 360 heads on a LA 318?
Some police LA 318’s had factory 4 bbl. & some aftermarket 318 4bbl. intakes are available too. 3. I think the modern “hot ticket” is to run magnum 318 (5.2L) heads You are correct. I’ve run 360 heads on a LA 318 many years ago because I was worried about port mis-match & wanted to run a 4 bbl. carburetor.
Can you use 360 heads on a 340?
From what the old DC Race Manual mentioned, before 360s came out, but 340s had the 2.02 intakes, you could use the 340 heads IF you clearanced the top of the cylinder bores to clear the bigger intake valves of the 340. Bigger ports don’t always work better on smaller displacement motors, unless they are really undersized to start with.
Which is better a 360 or a 318 head?
They will flow around the 190/200 cfm area. They will lower the compression ratio of the 318 some. But the good news is you will gain power due to better flow over the 318 head even with larger valves. Fully ported 318 heads (expensive) work better. (Yes, I know you have a 360. ;). )
What’s the difference between a 340 and a 318?
The left side motormount is different between the 318 and the 340/360. The 340 and 360 use the same mounts, while the 318 is all by itself (unless you have a 273 then that would be the same). The 360 oil pan is different from the 318 and 340, it has a smaller rear sealing face.
Is there a 318 with 340 heads debate?
The 318 with 340 heads debate. Its been kicked around for years and years, even the bore notching. Have you ever did the swap? Would you try it and why or why not? Yes this is a bated thread because ive a bit of semi concrete results on the topic. Funny, I just reread the Junkyard Jewel 400HP 318 build a couple days ago.