Hey all, I have started on a new motor for my 69 barracuda.
Anyways here is the parts I have. Its a 30 over 360, stock rods arp bolts, forged flattop pistons, should be 8.3-1. Small Engle hydraulic flat tappet cam 216 at .o50 in and ex, 113lc .486 lift with 1.6 roller rockers. ARP main bolts, head studs.
I have 2 sets of head to work with, one is a set of J heads with 2.02 valves, but need rebuilt, the other set is a fully rebuilt set of 587s with a 1.88" intake valves and some mild portwork, hardened seats, and are ready to go. Do you think it would be worth the $$ to rebuild the 915s or just run the 587s? The intake is a mopar m-1 singleplane, Carb is a 750 holley double pumper with annular boosters, that will be sent out for mods. I will be using homeade log manifolds, 1-5/8" primaries dumping into a 2.5" logs. The turbo I have is a holset H2E 19cm2 exhaust housing, similar in size to a hx 50. I am looking to get around 450rwhp. Think its possible with this combo? Anything else I need to add or change?
Also I have a 904 with a performance rebuild,a999 parts installed, mild shift kit and a 2500rpm converter. I doubt it will hold upto the hp and torque goals, but I dont know. Would I be better off selling this trans and building a 727?
Here is a pic of the car its going in

Here ya go,

http://www.forabodiesonly.com/mopar/showthread.php?t=128307

I'd get the intake seats ground for 2.020 valves on the finished heads, clean up the bowl work and never look back. The better the heads flow on the intake, the less boost it'll require to make power.

Use the finished heads. What fuel do you plan on using?

The money is going to be in the fabrication work...headers, exhaust, plumbing, inlet/outlet work... Unless you can weld it all yourself it's not going to be cheap. You can't use (flip) log mani's on a small block as the middle exhaust ports are not symmetrical

Just use some shorty headers that are flipped...

Hey all thanks for the replies!
I will be using mostly 93 pump gas.
Fabrication isnt a problem,It what I do for a living, so that saves me money.
I have thought about using flipped headers or manifolds, but they looked like they wouldnt fit, so I droped the idea.
The only shortys I have seen reasonable $$ are for trucks, but they look like the would hit the stering box and the pump. I have thought about going manual steering, but that adds more $$ to the project.

I also forgot to add the air to water IC in my list of parts!

I see that your carb still needs mods. Look into having it set up for E85. With E85, you wont need an I.C and all the extra plumbing that goes with it. This is only going to work if you have stations in your town that have E85, though.

I wouldn't spend any money on the 587's and just run them as is, they are more than enough head to support 450hp boosted.
The guys doing this with the magnum engines use the early truck manifolds reversed- an adv for the magnum platform.

I found a set of used stainless shorties, cut the stock collector off, flipped them. The drivers side would hit the PS pump, so made a little spacer/bracket to move the pump about 1/2" out of the way.

Magnum exhaust manifolds will fit with out mods on a-body. I think the shorty magnums headers like i used need some moods to get them t fit in a a-body, check turbomustangs.com there have been a fews guys that have used them, $150.00 summit aka pacesetter shorties.get the 91-92 casting year from a truck they have the big outlets, 2 1/4 inch i think. Look up "topfueldart" on here he built his using those in a 68 or 69 dart with a 318 and its non-intercooled and runs 11's. I think twice about the holset turbo unles you already have it. if your not worried about cutting a little bit of the car i would go with a borg warner s400 75mm or 80mm (t-6 framed), it gives you room to grow. Or if your tight on space get a Master Power t-70 or t-76. i currently have a s400-75mm on my truck with a similar engine and cam as yours and have been 10.90's on 10psi on 93oct. i had the t-70 on my old 360 with exhaust manifolds and a tiny cross over pipe and went 11.80's all day on 7psi with 93 in my truck with a gen one cummins intecooler..the cross over and intercooler killed the combo this was all about 6 years ago before i found turbomustangs.com and started to get smart and ask and read stuff on the site with people with "RUNNING" and driving turbo stuff not people that dont have or have friend with a turbo car giving you advise. Point being i have used ebay style "X02 brand" wastegates and bov and $150 vsracing intercooler for years with no problems and $500 borg warner or Master power turbo with no major issues.

Thanks for the info! If manifold will fit I will just use them (sav some time and $$. I already have the turbo I measured the inducer and its only 61mm so I think I would like to go bigger, but I also can get a master power t70 from a friend for $200. I would be happy if my car would run somewhere in the 12s reliably.
As for the transmission, do you think the built 904 that I have will hold up, or should I sell it an have a 727 built?

A very "mild" 727 should hold up fine. The 904 would have to be really stout ($$$) to hold up. I'd go the 727 route.

You're not going insane with the build so the 904 should last.

that 61mm is tiny.....what exhaust side does the t70 have....if it is the .68 or .81 it will choke the engine...the .96 will be fine. i dont see why a 904 with a valve body and good cluthes and convertor wont hold up, its a light car. Turbos arent as abusive on parts as superchargers or nitrous

Well if the 904 has a chance of holding up I would like to keep it (its allready in the car).
The turbo is a t-70/Q trim with a divided 1.0 a/r. I have friend that will give me a chinese y2004k gt45 turbo 1.05 a/r but not sure if it would be worth even trying, dont know much about them.

Ive built a few turbo 2.3 fords, it a little different setting up a v-8 turbo.

I don't know why people think a 904 will not hold up trust me as long as its not a lock up converter model you will be fine with the 904. I have run 6:20's for years in the 1/8 mile with a W2 engine with a 904 with a 1:30 60 foot time with nothing special done to it zero problems carrying the front wheels every pass. I can promise at your power goals you will not hurt that 904 if its a good transmission now.

Also its lighter and takes less to turn it so no way I would pull a 904 to put a 727 in at your power level

Well it looks like this engine is going to get a little more low budget. The block I was building for this engine has a crack in the cylinder wall. so I need to find a replacement. So what I am thinking of doing is. I have a fresh 360 with no miles, but unfortunatly has cast pistons. ITs ballanced and ready to go. I think I am just going to put my cam in it, and run it. In the mean time I will build a much stronger short block, with forged parts.

I think I am just going to run the 904, befor it was freshend it held up to a mild 318 with 150 shot.

I think I am going to build my log manifolds, I think they will fit much better than the cast manifolds.

"Runs into the steering box (power) at least in my case. "

Yes. I had a 3/8" (about) spacer made to relocate the PS about 3/8" (again, about).