Re: Help on kits
I don't know if the quality of the customer service from the vendors in the above links is/are any good, based on some of the posts here in this forum made by other members.
There are at least two currently active threads about problems members are having with their kits from the vendor in the 1st link.
From time to time, there are rants and complaints about the vendor in the 2nd and 3rd links.
If you are mechanically inclined, have a good workshop and plenty of tools, are able to test troubleshoot and repair engine parts then there should be no real concern about what vendor to use, and just look for lowest price.
If you are not the above, and need some hand-holding during assembly and testing, need good customer service and a good warranty, then I suggest you do some more research on some other vendors.