[El Dorado Jim]

I have a '74 K20 with the aluminum bell housing sm465/205 It has held up for over 20 years behind a 454...I removed the original 350 engine 350 auto trans/205 combo in 1995 and haven't had any issues with the alum bell housing, I recently removed the cast iron bellhousing , and sm465 trans/ 205 in my '72 K20,trans case was noisy, I had a setupfrom a '74, I installed it with no problems, just had to use the old clutch release arm, and had to change the pivot ball from the old cast bellhousing to the aluminum housing, I like using the alum bellhousing , it is so much lighter and I can use the 2-bolt starter like the rest of my trucks use... we did the same setup in my sons '70 gmc K20