Mechanical, which was a bit of a surprise to be honest. The 1.5" gauges fit perfect in the holes.
Well, the car's time with the 318 in the bay may come to an end earlier than expected. I didn't get any compression when I did the ole "put a finger in the spark plug hole and spin the engine over" test a couple days ago. I need to get a compression-tester since I can't find my other one. I think if I do get low/no-compression when I test it then I'm just going to yank the 318/904 out and be done with it. I don't wanna put any more money into that engine if I'm going with the new Hemi anyway......this may be awhile.
I have to admit I'm frustrated that I spent all that time doing the wiring and converting to the HEI setup just to pull the engine. Probably could've avoided it all had I done a compression test first. Live and learn I guess.
Great power and mileage . I'd seriously consider doing the swap if I had easy access to the parts. 360 swap has been fin but a pig on gas.
The lifters depend on year. It seems ro happen more with the 09 and newer engines. Idle time doesn't matter much its a defect with the lifters themselves. There are a lot of people whove had them fail with limited use. They made some changes to them which helped but there are still failures. Definitely worth checking what the cam and lifters look now to save some work. Some earlier years also had valve seat problems.
Long idle time tends to increase chances of lifter failure. Early gen2 Hemis have failure of the lash assembly, especially in the MDS lifter, and they fail the roller same as the later engines do, just not as often, usually due to the oil used in them.