Not a 340 intake. Looks to be a '80-4? 318/360 intake. What's the casting number and date code? Oh, and have done what Max1196 shows. TQ intakes were very prone to cracks in that area. For example, when was the last time you found a good TQ cast iron intake for a 440? I've magged over 200 or those intakes and found 3 that weren't cracked. The 400's weren't much better. The small block intakes weren't quite as bad, but, it still happens more often than you think.
