There isn't more, the pulsar bolts are bigger. Why would you want to? The stock GTi bottom end is plenty good enough for 300+ bhp and is better to drive off boost.
Way more expensive, more lag, loads more work to fit? How much more than 300bhp do you need to go in a fwd Micra?
If you already have a pulsar bottom end then fair enough. But the fact the clutch and flywheel don't fit and the GTi head won't fit seems silly to go looking for one.
The GTi engine already has forged rods as standard. It's been proved many times that with the right turbo and fuel setup a stock engine can produce a lot of power.
When you mention mounts, what do you mean? When used in a FWD it's mounted identical to a GTi engine.
350bhp won't get you near the fastest micra to run at Crail.
You can convert most of the parts from the GTI-R to the Gti engine anyway. Low comp forged pistons are available for them. Engine girdle will fit on. I don't think you've though it through.
I though Stani was shooting for FWD? I don't see it cracking the Bandits time on 350bhp. Just my 2p.
I have proof of dave himself saying 350, slicks and boost control will get a micra into 11's