Starting Wed. I will be switching out the old 307 with the 3speed and putting my 350 with M21 into my 68 lwb. Does the frame already have the holes for the automatic crossmember or do I have to drill some, since it is a 3 speed and held on by the bellhousing. Also, I've read that my 350 long water pump will need an electric fan? Is this true. Is there that much a difference with the length when switching from a short to a long water pump system? Any help is greatly appreciated. I hope I don't find any bugs because this is my daily driver!
