Type 4 Engine build basics, Best approach on rebuild options Options

[TomL]

I am hoping to build a good, solid, higher performance Type 4 which will be used as a daily driver, touring car and perhaps an occasional AX. I have some questions.
1. Are all type 4 engine cases identical? If so, why are "GA" cases preferable?
2. What practical difference is there between a 78.4 stroke crank and an 80mm crank--since the 80mm seems to be more prevalent and a little less expensive?
3. Which is the most preferable bore--94mm, 96mm or 103/4mm?
4. Is there any practical difference between standard 2.0 sized crank journals and chevy sized?
5. Can 1.8 heads be "massaged" enough for decent performance?
6. Pure speculation--What kind of HP might I expect out of an engine with: 80mm stroke, 96mm bore, a moderate cam, re-worked 1.8 heads (8.5 or 9:1CR) and carbs?

Thanks for any answers you can give
TomL

[Bleyseng]

All type 4 cases are basically the same:
Early cases don't have the ledge inside for the windage tray
Bus and 411 cases have a different oil filler setup and oil dipstick
GA cases have the oil temp sender inthe bottom plus is milled out so the sender fits prefectly

The best way to get to a high hp daily driver engine is buy a Raby kit as its great setup combo-either a 2056cc or 2270cc.
78.4 or 80mm stroke cranks with the 2.0l rods isn't the best setup as the bearings are smallish and no modern type bearings are made for it.
96mm steel cylinders are fine, not so with 103mm steel as they warp fast so NIkkies are the hot ticket if you want to go big.

1.8L heads from HAM/Raby are made to be as nice as the 2.0L 914 ones.

Wild guess - hmm, 130-140hp without proper setup combo and guess tossing parts together.