I got a 351 W and would like to now whut the best HIGH-PERFORMANCE cam. Thanks

 

How long is a piece of string? You cant just pick up a cam that works well for one person and expect it to perform for every application. It depends on so many factors. We will need to know some more details, such as
1 Your compression ratio
2 What heads are you running
3 What intake
4 carby
5 Type of ignition
6 Auto or manual
7 Rear gear ratio
8 What vehicle
9 Application (street street/track or track only)
After this there will be enough experience on here to guide you in the right direction

 

1970 Mustang coupe and mighty demon carb ,Victor Jr. heads, Edelbrock Victor Jr. Intake and its manual. Rear gear ratio is 3.73 and its a street car.

 

As you have gone extreme in head and intake selection ie up to 8500 RPM capability. What have you done to the block and rotating assembly to handle these sort of revs? Most importantly if looking at cam selecetion alone, what is you compression ratio?
If your compression is up at around 11.5:1 I would be looking a mechanical roller cam like this

http://www.cranecams.com/?show=brows...tType=camshaft
But this is really a track based combination. Personally I think the Victor Jr setup is way too much for the street. I don't know if this is you, but have you just gone out and bought the head/intake that advertise the highest power achievable, hoping to simply bolt these on to you existing block?

 

how much horsepower do you think the Engine will have.

 

Answer the questions above, because at the moment all you have is a ticking time bomb.

 

I see no ticking time bomb in the combo and would run a solid roller around 590-600 240-250@50

 

Dont ever give me engine advise then!.
My point above is that if you simply take a Victor Jr intake, heads and a cam like you suggested and slap them into a stock short motor, you DO have a ticking time bomb. This combo is capable of reving to over 8500RPM, and infact needs to rev up near 7000RPM to make power. Major work needs to be put into block strengthening and reciprcating parts selection and balance to ensure the thing will hold together.
This senario is typical of people looking for parts that are the "BEST" without looking at the total package.
Recipe for disaster! Hence my ticking time bomb comment.
BTW the cam I suggested above is a 246/256@.050 solid roller.
Whoops I forgot to mention, we don't even know what the compression ratio will be. Slap this stuff on a standard short motor with 9.5:1, and I doubt it will even run, so maybe it wont be a bomb

 

I dont know in my 15 years of building small and 700+ inch big block, this setup he has is nothing dramatic by any means. That motor will make plenty off idle to 6500. Noone in their right mind is gonna turn a stock rod-stock bolt to 7k+ and expect it to live. Just limit the rpm by cam selection, its not rocket science. So what if he stepped down to a twisted wedge head, vic jr intake 750 holley, is it still a time bomb? Cmon man

 

My point exactly. I see nothing wrong with the parts selection, as long as the rest of the combo is built to handle it. Check this guys posts. Two months ago he wants to know what the best block is, then the heads and intake, now he says he has them and wants to know what cam to use. Do YOU think he has thought about the full combo?
As for you question about stepping down to twisted heads etc, yes, its still a time bomb without approprate block and reciprocating parts work. In my opionion, the most the stardard short bock setup can take without being a time bomb is around about the Performer RPM spec.