I have a 75 TA 4speed,(bought as is) with a late 74 early 75 400, code 481988, date code oct. 74. 4x-7H heads, date code oct. 73. It has been punched 30 over. I am doing a complete rebuild myself,except machineing. It had anti-freeze in the pan and in the left side cylinders when I pulled the heads off. I am trying to find out what cam I have and how big I can go with out having clearence problems. The only numbers I can find on the cam are 1805 GMC and O1 or C1, hard to tell. I miced the cam and got 1.300/1.591 and 1.334/1.608. Can't find this part number, so I don't know where to start as per lift or duration. It has headers and I am going to put an Edelbrock intake and carb on it. Any ideas?
thanks,Mike

I have a 75 TA 4speed,(bought as is) with a late 74 early 75 400, code 481988, date code oct. 74. 4x-7H heads, date code oct. 73. It has been punched 30 over. I am doing a complete rebuild myself,except machineing. It had anti-freeze in the pan and in the left side cylinders when I pulled the heads off. I am trying to find out what cam I have and how big I can go with out having clearence problems. The only numbers I can find on the cam are 1805 GMC and O1 or C1, hard to tell. I miced the cam and got 1.300/1.591 and 1.334/1.608. Can't find this part number, so I don't know where to start as per lift or duration. It has headers and I am going to put an Edelbrock intake and carb on it. Any ideas?
thanks,Mike