got this pictures from our groups board and website here in the philippines "GRUPO TOYOTA" what they used are adaptors from 5k engines..i'm not sure in other countries but here we have what we call toyota liteace van's with 5k's on them..no need to fabricate the pipings..

and these are from ae92's with 4af's on them hope this help..you could visit our boards @
www.grupotoyota.com.ph/boards since we're all toyota lovers here everyone is welcome to register..although you may have some problems understanding our dialect but you could ask anything anyways...you could also opt to use UFO filters