STR12 edelbrock crossram fitment

[Illahe]

Just so you understand what a Street Tunnel Ram is - if you think about the vertical runners on a tunnel ram, stick the four fingers of both hands up in the air palm to palm in that configuration, since it is a Mopar small block pair the fingers of each hand, offset them a bit and then fold the finger pairs flat so they are horizontal. Now you know what the inside of a street tunnel ram looks like under the top plate. There are long runners and the carb on the left side of the engine feeds the cylinders on the right side and the carb on the right side of the engine feeds the left side cylinders.
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This by the way is why it never made any sense to me that Edelbrock offered six pak, single centered four bbl ,and single Dominator tops for the STR intakes on Mopar RB motors.

TA heads?

 

[str12-340]

yep, TA heads... Since 1978 on this motor.

 

[highwaystar]

My 68 GTS

 

[highwaystar]

Pix

 

[str12-340]

My 68 GTS

Does that one have a billet top too???

 

[RustyRatRod]

I believe edelbrock has stated that the core boxes went missing decades ago and they have zero intention of ever remaking. I have one on a 410 stroker, that I initially used the dual 4 barrel fitech EFI on, but later I switched to dual quick fuel 450s. Runs great, and I didnt bother with the internal mods, I have never had any issues with backfires or anything like that.

Cause you're smart enough not to over fuel the piss out of fit.

 

[hemi446]

Here is a picture of the engine in my sons 67 Barracuda. It's a 426ci with two Holley Sniper throttle bodies. Sorry the picture is not better. The engine has changed since the picture was taken. He is working on putting A/C back ing the car.

 

[shags72]

I'm familiar with what they are and how they generally look under the cover, I've just never seen one close up to be able to get dimensions. I doubt it will be easy and possibly is far beyond my capability, but should be a fun effort. I surely will document the success or failure here when the time comes.

If you are going to fix the top, you might consider some ribs on the bottom to strengthen the top. The cast top ain't very thick and it's just cast aluminum with the weight of the carbs,etc. sitting on it too. My system has a CNC milled top from aluminum billet. I got it at the Nats 20 years ago and it was the last of 20 a machine shop made. If there were enough folks that wanted one of these I'd be glad to remove the lid over the winter and give it to a shop with CNC capabilities to make a run. It would be a LOT easier to do it copying an existing billet top than copying a cast top.

Holidays have me running ragged and couldn't put any time to responding with any real thought to it, so I have a few minutes and wanted to respond to you sir. I am going to fix it for sure. I will need to look at the underside better to see where and how to reinforce it. Here are some pics of the intake. My brother is an excellent welder and he's meticulous with aluminum welding. Thankfully! If all goes to he!! with the repairs I may be asking for help on a lid. I really am a ways from putting the engine together. The money I just spent on this flippin intake has put me behind on purchasing all the things to finish it, but dang I just had to get it! My first thought was after I bought it was, damn does it fit under the hood? LMAO shoulda asked this before, but you've answered that question exceptionally well! I am really happy that it can be done and I won't have to change the hood that I freaking love! So thank you for your responses and insight and will be asking for more help in the future when it comes to some of the connections, like transmission throttle pressure setup and all that. Again Thanks!