Yeah I suggested he try another tach as well Dwayne but I doubt if its that either. He used to run a hughes 3500 which he said he may put back in, I hope not, the cars a dog with that compared and goes 1.65 60's and mid 11's. He said he was going to lose some weight which will help and I suggested he go to 4.10's with a 29" tyre or tbh a 9x30 would be better still I think, I was going to suggest 4.30's but I think I'm pushing my luck there.... the car sits level and he's not cutting it up so perhaps 30's are out, he runs QA1 shocks but its not going to get a mini tub.

My other mate ran an 8" 5000 stall by ATI he had made and that trapped at 67>6800 behind a 3150lb Dart with a 600hp 440, 4.56/31" tyre combo, Perhaps he'll go for it and have 1 made, I think thats the answer and the fix, a built 8 or 9.5", I've never come across any converter in any car that slips 20%. My old 440 car with an 8" 4800stall only slipped 8% Na and 11% on N20.

He's a bit concerned about the rpm, not keen on going 7k on the limiter, it has internal oiling which I've never been a fan of but don't want to go there and put that into his head, many run the 1/2" pipe with no issues to past 7k I know. He runs his own garage and is a good listener and wants to learn more, why he listens to me I don't know