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For my combination in my 1966 Barracuda, I'm using the stock 6319s Thermoquad from a 73 340. It's a 73 340 bored over .040 with the factory style 10.5 to 1 pistons Comp Cam XE262 cam 273 forged crankshaft to fit to the early 904 TC Dougs 450 headers LD340 intake manifold Seems to be a perfect...

What is the casting numbers on the heads? 315 are the early ones and 920 are the later ones that fit most of the intakes out of there.

I'll be putting it on my friend's chassis dyno when I'm done. I was thinking right about 320-340 gross. Sounds like I'm right on track. I'll be interested to see what the chassis dyno says.

So I'm in the process of getting my 340 rebuilt and wanted an estimate on what the collective through the HP is. It's going into my 66 Barracuda. Here are all of the specs. 1973 340 block bored .040 over 1965 273 forged crank and matching Torque converter/transmission, etc. KBHypereutectic...

Sounds to me like the motor was opened at one time. It would be a royal FUBAR if they mixed heads at the factory. The .10 under crack could be factory.

So just as a follow-up, I found a local torque converter builder that is going to make me the right converter for the motor. He is going to up the stall speed to 2200 and rebalance the converter to the right specs for $225 I also found in the box of all of the parts from my dad's place, the...

Sounds good Geof. I've got to talk to my transmission guy tomorrow so maybe he can give some direction as well.

I meant flexplate. Mental typo. :) I have a second 904 out of a 1965 that I am looking to have a friend go through while I'm having the motor gone through. For the converter, That is the $100K question. Right now I have a 1965 and a 1966 904 torque converter. If I need to get a different one...

Hi everyone. I picked up a 340 from my dad. It's a 1973 cast 3/20/73 with the number on the flat tab below the drain plug being 3B44374. It's got the 360 596 casting number heads and I believe a comp XE268 cam with the matching springs. It currently has a performer 318/360 intake on it...

It's not you. They are purple. That is what got me scratching my head because I've only seen MP cams with purple in the cast sections.

Hi everyone. I've got a 273 that was built in the mid to late 80's. I had the manifold off today while resealing the intake manifold and got a good look at the camshaft that was in it. It sure looks like it is one of the mopar performance purple shaft cams. I'm trying to figure it out because I...