How much ET will i pickup with following changes

I would say the 904 trans should pick you up .15 .....and the converter should help the 60 ft time which do look soft...I was going to mention the 4.10 gearing but I see only 28 inch tall tires so that is not so bad...
With the 4.10 I might have considered the low gear set for the 904 but it is what it is....

So I think 3 tenth is pretty doable ....have fun