just do a dyno pull. at the local place its 25 bucks for a pull. strap it on there. have them rev it to 5500. More than likely it will stop making power at 5.

if its still stock heads and springs i say it will be done by 4800 and close to floating at 5

 

hence being safe at 4500, Screw it man, we dont know ****, rev that hog to 6600 like i rev mine, hell it should be fine, there both windsors right?

 

^^ LOL! Yeah they are both windsors, LMAO!!!!!!!!!


But On a serious note, One pull is all you need. Its actually quite cheap!

 

Mine just has 67 more cubic inches than yours and, a slightly better set of cam and valve train components

 

we just got a new dyno place in town. but it didnt know that pulls were that cheap.

 

we used to charge $90 for an hour, unlimited pulls, $125 with a wideband sensor up the tail pipe. Single runs wer from $25~40 depending on what you wanted monitored

 

I've got a 357 With trick flow TW heads 1.6 RR's and a .520/ .538 Lift Flat tappet cam. I set my rev limiter @ 6K.
If you dont have a girdle, windage tray and some beefed up internals you're insane reving a windsor past 6k IMO.