Steve, a couple other things, while I'm thinking about it.
The engine I have isn't stock anymore, either. It's a 2424 now (104.5x71). It had been a 2366 (103x71).
The pistons and cylinders are Total Seal. The heads are oval-port bus, and the case was -- as far as anyone's been able to tell me, a 912E 2.0 that went the aircraft route and never got installed in either a car or a plane. I got it by way of a guy who broke a rocker arm in a dragster; wanted to replace the whole engine anyway. It had no cooling pieces on it at all when I took delivery.
Jake's shroud fit just fine. He'll recommend tins for the surround, and it's much less of a pain in the butt to use the hydro-cut ones he's got than to try to do them all yourself.
The tins will just be the apron pieces that mate to the shroud itself, and you'll have to cut the holes for your turbo plumbing.
Aslo, depending on where -- and how -- your turbo pipes live, you should know that that shroud is fiberglass.
Your brackets and such can probably use the shroud for support, but I wouldn't count it as the primary mount for anything that vibrates a lot.
A couple extra bolts and a motor plate will cut down on the cracks in the 'glass over time.
After two years, and I don't drive all that carefully, mine has developed some cracks around the rivets and such. It's not a show car, so I really don't care.
I bought the Stage III kit from him, if memory serves. Shroud, tins, generator stand, ... everything minus the alternator, fan, pulley and such.
His crank pulley works well and the whole shooting match uses a Beetle belt. It didn't require a lot of thought to put together, but the carb linkage has to go on the tail-light side of the shroud, and you'll want to put it all together before stuffing it up into the car. I'd recommend clearing out the entire lower engine compartment, making the sidewalls go straight down to open air -- no bottom-side horizontal tins around the frame -- until it's installed and you can make your own to match the tins Jake sends. I made all my own tins, apart from the six or so pieces in Jake's kit, but I also installed the engine with the rear of the body removed from the car.
I kinda went a little overboard, and the guy who did the car with me had done this stuff hundreds of times before. That really helped cut down on the learning curve.