Certainly quite a complex job to strip an engine l have done it in the past a couple of times but not without the help of a pro, not saying it can’t be done but not the sort of job for a novice for sure, l mean it’s a fact of life you will always get the odd oil leak on those older engines it’s just the way they are it’s what they did. I have seen a few of my mates attempt it in the past the motors have ended up in the eternal box of bits.