yikes, a lot of reading here. have seen a HEI made by a Mopar distributor that looks decent, have some follow up to do but is not a name brand: eBay (ebaydesc.com)
I have been running the Erhenberg Slant 6 Hi Rev kit for 2 years now. I really like it and cannot believe I am driving the same car! And, the important thing is that you are getting a really good distributor with this kit. So, if you want to convert to GM HEI, or an MSD 6A, you can do that later on down the road.
yikes, a lot of reading here. have seen a HEI made by a Mopar distributor that looks decent, have some follow up to do but is not a name brand: eBay (ebaydesc.com)