029 4 = 29th day of 1974 assembly date


6488s = 1974 360 automatic trans

Yes it will work fine for you, and probably won't need a rebuild, I'd try it as is first, however if it does need a build:

Any TQ, AVS, AFB, Holley, Single 4 barrel is $399.00 plus shipping for the works. Missing or broken core parts not included.