Hello everyone,in my 68 fastback is a 318/904a. Is there anyone who has had any luck installing either a 426 or a 340 six pack in there a- bodies?. I have done some reading about the Hemi cudas of the day and it seems there is a little moving around of things, meaning shock tower on the rightside ,and the master cylinder etc. It seems that the 340 was the engine to have. But I do like that big block sound. Please share with me any of your thoughts. Thanks LIL,FISH or Chris