Hello, and thank you for considering us for our machining services.   We want to make this experience as headache free as possible.  Custom Engine Machining has many variances depending on the condition of your core.   Please include the information sheet with your contact and casting info.  We will inspect your connecting rods for quality before we machine, and this takes non refundable labor; for example cleaning, crack detection.   Please Send Us Good Rod Cores.  If one is roasted, keep it as a souvenir and just send 3.  We have pre made, weight matched sets of good rods ready, and your will not receive the rods that you send in.   There is NO CORE REQUIRED to buy our pre made sets, and we offer core discount off of the total price per good crack free rod core.   We only offer mail order rod service for our specific engines listed below, and do not offer one off rod recondition services via mail order.