ffor just a little more you can get a set of World Windsor SR.s My car made 491rwhp with those heads on it, N/A with no nos. I am building a new motor now, and i can tell you that i am using the same heads for a while and expect to make well over 491 rwhp.

 

what was your old engine? was it just a stock 351 or was it stroked?

 

those have specs close to gt40p's at least in the valve size. not sure how the runners are on the p's but i would say go with something a little bigger.

 

actually that old motor was one i bought in the car, and it turned out to be the most rag tag pile of **** parts i have ever seen run, but it ran good and made good power for the whole 81 miles i drove it before it blew apart