Post by mrbiggz5150 on Sept 16, 2014 18:54:28 GMT -5
Hello I am in process of swapping out the stock 4.3l to a 7.4l performance built big block. I have tried to look up online about the motor mounts placement. Is it the same? Or do you have to move the towers forward due to a longer engine block? any pics? Please if you have any advice I would love to keep this project moving forward. Thanks
Post by Pontiac1976 on Sept 26, 2014 19:39:34 GMT -5
Hello Mrbiggz5150. If I remember right up and back a little. but will depend on the Trans your using. Do you have the mounting brackets that the motor mount bolt too. Oh what year 73-80 or 81-87 frame are you working with because there a little different very close. What year 7.4 because I can only tell you 73-77 7.4 motor mounts 5.7L 73-87 are the same for the booth. I had a 77 7.4L mated to a 77 350TH Now I got a 83 5.0L mated to the same 77 350TH. I using the same motor mounts & mounting brackets but in a holes. I know the 7.4L sites close to the fire wall. I will go throw my pic's and see if I have shoot of it. the First thing is do you have the right mounting bracket for your 7.4L
77 1/2 ton Heavy Half chev 454,350TH,3.07rear driven 6 YR now changed back to 85 monte carlo SS 305 Motor as of 2004, june,30 inter changed to 84 GMC style, flatbed with a 98 van bumper.