I build mostly performance or racing engines, for every engine job I do, I do another dozen component jobs where I just repair/rebuild/trick out some part for a customer and they put it together. My policy has always been that the DIYer is as an important customer to me as the customer buying the complete engine. I even built entire engines in kit form before for the customer to assemble. I'm building a almost stock 1275 right now for a customer he has built engines before. He had a specfic problem he couldn't fiquire out and got disgusted and sent it to me. He has a 5 speed kit in the car and a aftermarket rear seal kit, it was pouring oil out the back. I have not had any luck with the rear seal kits, they all leak more after awhile than they did without it. So I fitted the block with the stock rear piece, got rid of the seal kit and had the block line bored, it will probably still leave a drop now and then, after all it is a A series engine /ubbthreads/images/graemlins/smile.gif but it won't pour oil like it did. The funny thing about this build is the customer must be living right, we found a huge crack in one of the rod journals in the crank, if he hadn't took it down when he did it was going to be a diaster.
Either way you decide, you can do this if you choose, just do the research and source the right machinist and get the proper tools, as mentioned already it's not rocket science, do it because you want to, because you have the passion for the task and want to learn from the exiperience, never do this because just you want to save a buck. Vizard is the bible of A series hot rodding, his book is more about performance than anything else, but there is alot of good production data in the book and alot of valueable "how to", his instructions on how to degree a cam are some of the best written instructions I ever seen, and this is the same for any car. I helped teach a engine rebuild class at the local tech school, we spent the entire seimester rebuilding a stock car engine, yeah it was cool but i doubt many of the students learn much about how to do it on thier own. I wanted to teach the students how they could do this on thier own, how to inspect and dissassemble an engine, take the parts to the machinist and know what to ask for and be able to check behind them and measure everything before the assembly, then teach them assembly, needless to say they are still putting together stock car engines with already machine parts with not much being taught about how those new or nicely reconditioned parts that got them to that stage.
I will suggest another book, Sunnen" Cylinder Head and Engine Rebuilding. Sunnen is one of the largest producers of automotive engine rebuilding and machining equipment, they published this book a text guide for studnets, you can buy it directly form Sunnen for like $30, it's a bargain. W aht it does is talk about all the equipment invlolved in the rebuilding of engine and cylinder heads and how to assemble. I think if the average DIY beginning engine builder reads this book, then they will have a better idea of what needs to be done or atleast checked and confirmed ok, and will be able to walk in a machine shop and know what to ask for. Now add a Bentley reapir manual and old bearing book to your collection and you have the perfect set to build your engine. Either way you decide let me know if i can be of any help and that includes free advice.