With almost the same combo save for the Mopar 284/484 I had in the engine(now a 292/509)I went 11.60 with a 3560#(me and fuel all steel except hood) Demon 5.13 Dana 31.25 tall tires and stock 727 with TA 3800 converter.

Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.