Not likely...he is running a 9" rear end....which will eat up 15% of that power...probably another 10% through the trans and driveshaft. Calculator says a best case scenario of 11.2 seconds with that factored in...if he has the traction and assuming a 3100lb weight on the finished car. More realistic is to say 11.5 or so....but my guess also means nothing. Its actually why I think aiming above 350HP is kinda futile...you start chasing diminishing returns and adding a lot of stress on the engine and make the car into an unstreetable race car at a certain point.1/4 mile calculator shows a 10.7
It would be more effective run through an 8.8" rear end with REM polished gears and an aluminum driveshaft instead...that would put him right at 11.0 with hopes of hitting a 10.9...but its more work to build an 8.8 to handle that type of power...would require a truss system and I would personally go with 9" bearing ends to get around all the c-clip eliminator goofiness....alternatively he could also add 30 more HP to the engine for the same effect...but that option just makes the engine more high strung and unstreetable than it already is.
P.S. To the OP...sorry for talking about you in 3rd person here, just trying to make the grammar sound correct for a reply to someone else. Is there a reason other than bragging rights you are trying to hit a 10 second 1/4 mile time? Is it a competition car?