AJ, based on charts, my SCR is around 8.1-8.5. CCP is about 135-145. Cam card below.
a bit sluggish off the line.
I'm not an automatic guy. and I feel that there are many, more qualified guys on board to steer you in the right direction. Therefore, I can only offer my opinion which is coming, lol.
>A bit sluggish off the line?
What is the current stall?
1)
If your 904 is slipping already, fix it now! cuz if you pump crap thru your brand new convertor, I don't see that ending well.
2)
IDK what you need. But I know what I'd want;
I'd want a minimum 2200 for the cam,
plus 300 for the low pressure,
plus 200 more for the B-body weight
plus 200 for the 3.23s ;
equals a minimum of 2900. That's what I'd want.
3) But your 213*cam is done by ~4600ish, say a 1>2 shift @5000, and
Your 904 has a .59 1>2 shift split, so, .59x 5000=2960. So your powerband wants to be from 2960 to 5000. That's a really long pull. Therefore, Ima gonna round that up ~20%, to say
3400.
4) The problem is that mathematically 65mph=2714 with 26" tires at Zero slip. Add say 3% for typical slip equals a cruise rpm of say 2800. So if Ima gonna cruise a lot, that 3400 is gonna pump heat into the trans-oil, and from there into your cooling system. Therefore, I'd go back to the 2800, maybe a 3000 tops.
But if it's a city car, those 3.23s are getting swapped out for at least 3.91s; which will change the cruise rpm to ~3400, which puts the 3400Tc back on the table.
5) IMHO,
I gotta say this. A stock lo-compression 318 pumps about 140psi at sealevel. Mine when it got fresh rings, pumped 135 at 930ft elevation. and I do run 3.23s behind it. With a TQ on top, a small-port Iron intake, and a good tune; it does pretty fine with a 2800. I'm happy enough with it, that I have never changed it, in the several decades it has been in service.
But I admit, she's still running the Factory cam, and, altho, she's been in several A-bodies, over the decades, she is currently installed in an 84 D100, lol.
Sometimes she was my DD, sometimes a weekend blaster, another stretch of five years, she was my winter-engine. Then my son loved it so much, He bought it and we installed it into his D100, and he drove it for more than 5 years. and then, when he got married, it came to roost back home, and now, she's a dump-runner. That old 1973 engine has a lotta lotta miles on her. Almost all of them with me, were with the 2800Tc.
She has, at one time or another, run nearly every gear from 2.76 to 4.88, almost always with the 2800/never more. When I bought that TC, back in the late 70s, it was billed as a Trac-Action, "Dirt-Jerker 2800". She was built for me by a co-worker in the rebuilder plant that I worked at.
Yeah, I know; that TC is over 50 years old; but still over 20 behind me.. Kudu's to my buddy. First car it went into was a 10 year old 69 Barracuda with a fresh 225.
I just like how mine winds up and then groans into action. I can almost hear the roller clutch creaking.
Yeah so, those are my ramblings.
