This thread is to serve as collected documentation and knowledge-seeking for my recently started engine rebuild. The donor engine is from a 1974 spider, and will find a new home in my 1978 spider soon enough. The engine shop is a 10x10ft shed in my back yard. Pictures of the engine in transit (for your amusement) and set up on the engine stand in the shop (a "before" picture of the engine) are attached. My goal is to build the engine to stock spec, with the addition of improved gaskets and oil rings, high lift valve springs, and other miscellany. I aim to build a competent, reliable street engine. I will add a 123ignition and am also considering an MSD box, though I fail to see how the MSD system is better given it still works with the same single ignition coil. Anyway, I'm looking at overhaul kits from Spruell Motorsport and already before touching the engine have some questions:
- Are oil passage restrictors to increase oil pressure recommended / are they always a good idea?
- What is the purpose of crankshaft oil gallery plugs offered by Spruell Motorsport?
- I expect this engine has 9.1:1 compression as does my 78 spider. The options I see available for rebuild are 10:1 motronic or 10.5:1 (shape unknown). Greater compression options are available though I assume they are for performance applications which I'm not ready to attempt on my first engine. Do these (10:1, 10.5:1) compression ratios still allow the use of 87 octane fuel? Is the performance improvement to 10.5:1 worth it in anyone's opinion? If possible I would prefer to stick with 87 octane as I run now as I daily drive the car in the summer and do a lot of road tripping. I don't want to spend more on fuel to gain 5HP.
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