that for sure and i am still thinking wanna put that engine or not.. bcz the v6 sounds interesting and the engine sound is very nice ... so i am still thinking is it worth to put it =P
Yes the sound is very nice.
I've seen 6A10 on a Wira, so since Iswara have the same engine as a Wira, won't be a problem with transplant if you have the halfcut.
Maybe just need a brake PAD upgrade to pass Puspakom. Once I failed Puspakom brake check with one of my cars, I changed with a cheapest NEW brake pad I could find, went 2nd time - passed.
But I think you'll be bored with 6A10 quickly. I had a 6A12 twin turbo before, love it.