[volspeed1970]

Ahh the old Motors Auto Repair Manuals...lots of great info but some of the info is not really clear. Those manuals do not differentiate between the 400 big block and small blocks thus where the confusion lies. I pulled both my 1970 and 1971 manuals and neither show the 400/330 as a big block or a small block, just a 400 4bbl engine. If this guy would read Alan Colvin's CBTN books he would understand. The engine codes in the Motors Auto Repair Manuals from both 70 & 71 show the engine codes with the correct hp ratings for each application, but it takes Alan's book to differentiate which engine is the small block and which is the big block.Tell him in 1970 the big cars didn't get the 400bb, only the small block as the only big block available in the 1970 models was the 454. In 1971 that changed as both small block and big block 400's were available in the big cars. The 400 sb still wasn't available in the Chevelle series either. Good luck with convincing him though I don't think you will be successful.