Hi all. I'm saving up for my 406 HSR build up right now and was trying to decide if the pro topline heads would be worth trying. I've noticed a few people are starting to use them but was wondering how they're workin out for em.
I'm plannin on using em in my chevelle after i replace my tpi'd motor with the 406 HSR. I'm also wondering what cam to use. Right now i've got my eye on the crane cams 278-2 grind. Its a 222*/234* at .050* with .467/.494in lift. Will this be enough cam for the HSR? Also will this cam be good behind my th350 with a 2000 stall and 4.10 gears I know that my tpi'd 350 and lunati 230/230 cam dont work too well with em. just a really missmatched cam/heads/stall ect. combonation I messed up when i put things together last time and im trying to do things right this time. So all the comments and recomendations you can throw at me are welcome.
My plans aren't set in stone so i can change em at any time. so please help me out.
Chris

 

I've talked with my engine builder about Pro Topline heads for my car, and he said the Toplines hes used have flowed as advertised. I'm using the 200cc Aluminum Lightnings on my 383 - And I have no doubt they'll work well with the HSR (the heads flow 260cfm at .500", and I thought I read somewhere onthis board that the HSR flows 275 cfm out of the box). I wont have to worry as much about stall or gearing until I take emissions and swap the Hotcam out for a CC306 grind (230/244). You might also try a search. I have read a few threads about the Pro Topline heads in the aftermarket product review you might find useful.

 

Check this thread. A lot of good info on Pros.