The OP is obviously not an experienced carb tuner so my advice is for his situation. Street cars are driven primarily at low to moderate throttle openings so it would be wise for him to get the carb correct there rather than mess up the part throttle by using a jet size that is way too big.

He should get the carb working correctly on the main circuit at cruise and then try to figure out the WOT issue. It is possible that the power valve circuit in that carb can't provide enough fuel for WOT. In that case he'll need to work with a carb expert to modify the circuit and/or get a different carb. Crutching it with a big jet is a bad solution for a street car although it does work okay on the dyno and at the drag strip.