Originally posted by Matt167
'66 200's are pretty much worthless because a '66 ( maby '65 ) up 200 has 7 bolt mains, [/B]
65 had 7 mains too, 64 was the only 200 that used the 170s 4 main design but some 64 200s do have 7, not sure exactly when they switched over. i run a 68 200 block in my 64 falcon.