I have a 454 bbc with srp small dome pistons for closed chamber heads. I also have a set of Dart Pro 1 heads pn#19200112, open chamber with 119cc. From my understanding is that i should be able to bolt the heads right on with no problems other than losing a little bit of compression. Am i right or am i wrong? Are they not compatible? Will i be running into more problems? Any info will help, thank you.  

It will bolt-together fine. Flame travel issues surround closed chamber pistons & heads since there would be less dome height if the dome were a open chamber design (the dome volume could be spread more across the crown of the piston) but if you're talking about a fairly low compression ratio (especially pump gas levels) I wouldn't see much of problem. The Dart Pro 1's are a great cylinder head, I hope your project works out well.  

Thank you for the info. Now that i have your attention i'd like to get further in the question. First let me tell you my combination, then ill ask your expertise. 468 bbc, gm steel 454 crank, Childs&Ablert 150 series aluminum rods, forged SRP small dome closed chamber pistons, Dart Pro1 19200112 119cc open chamber aluminum heads, Victor Jr. intake, holley 4150 830 annular carb, Crower cam with a .672/.672 mechanical roller, Msd digital6, Msd Pro Billet dist, a 1 stage Wilson Manifolds nitrous system 175-400hp, fuel cell, two Aeromotive1000 fuel pumps 1=carb 1=nitrous both independant. I figure the compression ratio is about 9:1, and i should be making at least 500hp on just the motor (let me know what you think i should be making). Now, since you said something about the flame distribution in the combustion chamber, what is going to happen when i spray, lets say a 250 shot on it, is it going to be a bomb waiting to happen, or are my detonation characteristics not going to change much. Am i going to have a nitrous tuning nightmare just because of the closed chamber pistons on the open chamber heads. Please shine a light on this, thank you.  

I can first say that aluminum rods are quite extravagant and highly unnecessary in this situation. They're not going to last forever and unless you regularly check them and replace them this engine will be in pieces and more than likely you will need a new block. The aluminum rods will be great for keeping the rod bearings and crank in good shape during nitrous use but you will pay a price, even the up-front costs of the rods themselves and the extensive balancing of the crank will add up, let alone losing an engine. But if the aluminum rods are stuck in the project, live with them but it may not be cheap if you need to replace them...

I say you can pretty easily make 600 horsepower on engine only, you sound like you have a pretty well balanced setup and you're building a nitrous system right. With that low dome flame travel issues shouldn't be a contributing factor to detonation. What I can say to do is radius and smooth the edges of the piston crown. This is very important step to reduce hot spots and to not interrupt mixture motion in the cylinder. Here's a picture of a set of SRP "semi-open" small dome pistons that I prepared a while back for a street 438. This dome has great shape out of the box but  there are still machining lines that are awfully sharp that need to be cut down. The pistons in the picture also have a pair of Techline coatings applied to them.