Any help would be appreciated. I killed my crankshaft in my 300ci. This whole engine has been gone through, I hate to give up on it...any leads are appreciated. I know it kinda hard to find parts for but not impossible. I'm up in western Washington area.ill be calling ta Performance next week to see if they can help. Is there any other interchangeable crankshaft out there? It is the low compression cast iron engine.
Is the crank good? I had a rod journal that was 0.60 out . At this point what's expensive? I need it.
I've sank to much into this engine to give up on it .literally all the internals are new and heads are new also. I'm to invested.plus it's the original engine to my 65.
I bought a new 350 crank set at Auto zone a few year ago, came with matching bearings, etc. About $250, if that fits the 300. I'm always amazed what i can get at the local auto parts stores. https://www.autozone.com/internal-e.../enginetech-crankshaft-kit-202400/1158998_0_0
The 350 mains would need to be ground down .5 ". Then you would make a stroker. 3.85" instead of 3.4".
I'm up for any suggestions. My engine is sitting at the machine shop held hostage until I get this figured out. Thanks everyone.
If you want to make me an offer on the 300 crank I'll consider it. I'll try to measure the journals today and post the sizes, could be std. For the stroker there are several approaches. If you get the rotating assy out of a late 350 you can use the capscrew rods and there's a 4 cylinder piston that works. The mains and the oil slinger need to be cut down to fit the 300 block. Or you can buy ex-nascar 6.2" rods off ebay for about $100 a set and use forged pistons. Other in between options exist. Here's a thread: Jim
Appears Jim forgot the thread. We used SpeedPro Ford Ranger 2.5 SOHC pistons. 1.19 compression height. They are 3.78" so .030 0ver 300 3.75". We went .020 more as Chris's 300 was already .030 over so 3.8" same as 350. That's .050 over stock 300 3.75". 350 capscrew rods were bushed with steel tubing as the Ford piston uses a .912 pin and Buick uses .940. Only clearance issues was front of pan needed a little ball peen work and windage tray was lowered with washers. Crower 50233 cam with their camsaver lifters. Pushrod oiling. Running great after 8 years.
I don't know if your dual quad intake will fit the 350. Someone else would have to chime in. I think the easiest route would be to find another 300 crank.
The 300 crank I have does have standard journals and they are in good condition. Probably would want to have them polished. I don't know what the shipping would cost. I'm at 41042 area code. That link I forgot is: https://www.mgexp.com/forum/mg-engine-swaps-forum.40/buick-300-350-stroker-thread.3405839/ The 350 crank with std bore gives 340cid. With .050 is 350. With .030 is 346. Jim
Not a runner. While getting my wife's 350 ready for freshening up I decided to build a spare with the extra parts I had. The block is bored, I think I did the oil mods on it also. So it would need to be assembled. I think Dr is right, way easier to get another crank. Where is that car show at? I don't recognize that town?!
