ORIGINAL: Tired Old Man

Plug angle can for sure be an issue when it comes to cowl fit but there's often a "fix" for that. Many engines use a 14mm plug which also requires a tall plug cap. You can install inserts to reduce the plug size to 10mm and use a smaller plug and cap. You might end up changing the compression ratio fractionally but if we're needing every erg of energy an engine can deliver we needed a larger engine anyway.