I just got my specs on a cam i sent to Comp Cams it is a solid roller for a SBC
254 intake duration
254 exhaust duration
420 lift lobe intake (also said 630?)
418 lift lobe exhaust (also said 627?)
105 lobe seperation
heres what i already have 400SBC bored 40 over,stock crank,stock dished pistons,solid roller lifters,3500 stall converter,TH350 trans.,4:10 ratio 12 bolt rearend,750 Holley Dominator,single plane Weiland Team G intake, I hope you can reccomend a set of heads to make this thing work w/ the cam i have i want to end up with 10:1 compression so i can run pump gas.They also said they could not regrind the cam above.Please Help!!!

What kind of price range in the heads? Id look possibly at AFR 210's or a 215cc head with an excellent exaust. A single pattern cam needs an excellent exaust to perform to its potential.

definately need a good set of heads to use that cam, its actually a real nice grind for a NA 406, imo. i would also recomend pro topline 220's, they flow great box stock, also excellent exhaust numbers. the one thing i see as being a sight "fly in the ointment", is that cam will love as much compression as you can live with, if your shooting for pump gas, get your quench and all other detonation issues sorted out, and i'd run it on the edge, and maybe use race gas and more timing at the track. thats a healthy cam, and its going to be pretty nasty with a 105 lsa.
now, with that said, i have to wonder why your building the motor around the cam, especially a motor you want streetable, around a borderline streetable cam (even in my opinion :D ). that cam is going to make power up there in the rpms, like around 65-7 K, and that stock bottom end will not like that, for long. the crank maybe you could work with, but i'd get a set of good light pistons, and good rod bolts, minimum. also maybe a bit more stall, for optimum performance.
as always, just my opinion, good luck with it.

Thanks for the knowledge,what if i got their xr286r part#12-772-8 (Weekend Warrior) and used my solid roller lifters.How would this cam and Vortec heads work with my combo?Will the used roller lifters be ok to use on new camshaft?

Don't take this wrong, but IMO you are going about this the wrong way. You want to pick a cam to match your combo . . . not the other way around. Especially since it looks to me like you already have all the short block parts.

You are also going to need more than 10:1 compression to run that cam -- more like 11:1. That is going to be tough with dished pistons. With .630" lift and 254* @ 050 duration your cam is going to be hard on valve train parts. This cam looks more like a race only grind to me, especially with the 105 LSA. And if you are going with a race only cam I'd look at more compression, like 12.5:1, and running 110 race fuel.

I honestly would suggest you re-think your cam choice. With 10:1 there are some nice street rollers that will work fine with pump gas and will be much easier on valve train parts. For example, the Comp XR280R-- specs are 280/286* advertised duration, 242/248* duration @ 050, .570/.576" lift, 110* LSA, 106* ICL

PS. I'd stay away from running a HR cam with SR lifters on it when there are perfectly good SR cams designed for SR lifters. AND Vortec heads are good for milder engines -- I'd personally rather spend money on better heads and go with a flat tappet cam. You'll make more power that way.

I agree with Eric completely. That cam is going to have a power band pretty high and the stock crank and rods aren't going to like that for too long.

I had a stock crank and rods that worked fine but I shifted it at 6000 RPM and the cam was 234/244,.488/.510 and flat tappet.

I have decided to toss the cam,what i was getting at is would you buy a new solid roller cam such as Comp's XR286R and use the solid lifters i already have and if so what head do you reccomend?Or i guess my other option is to sell the race cam and lifters and buy a flat tappet set up.I just can't afford a retro-fit HR for my old 400 block.

Well if you already have solid roller lifters and a short block that won't like big RPMs, just keep the solid roller cam size down.

I run the XR286R (on a custom 108* LSA) in my 388" motor and it will go to 6800 no problem. If you compare a solid roller cam to a flat tappet cam with the same .050 duration, the solid roller cam will have a much higher RPM band. The solid roller has more duration at .200" lift and opens the valves more giving it a higher power band.

Again, with 10:1 compression and stock bottom end parts I would look at the XR280R or with the Vortecs maybe even the next one down - the XR274R. The XR280R will go to 6500 RPM and the XR274R will go to 6200 RPM.

Your DCR would be 8.0:1 with the XR 280R (good with iron heads, a little low but OK with aluminum heads) or 8.2:1 with the XR274R (good for aluminum heads, a little high for iron).

Personally, I'd look at a set of ProTopline 200cc aluminum heads and the XR274R cut on a custom 108* LSA. Your DCR would be 8.3:1 and the engine would pull real hard from about 2400 to 6000-6200 RPM. Your bottom end would be happy at that RPM and you would make KILLER torque throughout the RPM band.