Up for sale, Knucklehead Left Side Engine Case. Accurately cast replacement Knucklehead left side engine case, wilth blank number boss. For Knucklehead 61" or 74" applications, so the deck height must be machined for an exact match to fit your existing right side case. Followed by line lapping of the case race. Hi/AK/PR/APO AP may be higher.I offer these parts at a discount on my website. All Sales are Final unless item is misrepresented. The item "New 1937-1947 Replica Harley Davidson Knucklehead Left Side Engine Case" is in sale since Thursday, July 12, 2018. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Antique, Vintage, Historic". The seller is "giveitfullthrottle" and is located in Kyle, Texas. This item can be shipped worldwide.