Dave The way I check # 1 TDC is remove valve cover roll the engine until #3 intake valve in full open #1 will be at TDC. roll engine until #6 intake valve is full open #5 will be at TDC, #2 intake full open #3 at TDC, #4 intake full open #6 at TDC,#1 intake open #2 at TDC, #5 intake open #4 at TDC..Hope this will help
