cam question

[SRKlegin]

Good afternoon,
My 1973 340 LA engine short block is getting there, but I am a bit concerned about the heads and the cam I pulled out of it before going to the machine shop:

Head casting number 3671587-8 and -9: everywhere I look these heads should've came with 1.88 1.06, but machine shop is finding 2.02 valves in there...can't remember the other dimension...machine shop phone ringing off the wall...sorry
I cleaned up the Cam and on FWD end common to the timing gear, there's cast number "1136" or "1186". on the aft portion common to the distributor gear I found a "63"

Any words of wisdom?

 

[SRKlegin]

Good afternoon,
My 1973 340 LA engine short block is getting there, but I am a bit concerned about the heads and the cam I pulled out of it before going to the machine shop:

Head casting number 3671587-8 and -9: everywhere I look these heads should've came with 1.88 1.06, but machine shop is finding 2.02 valves in there...can't remember the other dimension...machine shop phone ringing off the wall...sorry
I cleaned up the Cam and on FWD end common to the timing gear, there's cast number "1136" or "1186". on the aft portion common to the distributor gear I found a "63"

Any words of wisdom?

1.60 is the other dimension

 

[SRKlegin]

3671587 – 1973, 340 LA-series small-block, 1.88/1.60 valves, 65cc-73cc
3671587 – 1973-1974, 360 LA-series small-block, 1.88/1.60 valves, 65cc-73cc

 

[SRKlegin]

3671587 – 1973, 340 LA-series small-block, 1.88/1.60 valves, 65cc-73cc
3671587 – 1973-1974, 360 LA-series small-block, 1.88/1.60 valves, 65cc-73cc

A Guide To Mopar V8 Cylinder Head And Block Casting Numbers

Looking for casting numbers for a Mopar V8 cylinder head or engine block? It's probably listed in this guide, covering 1958-1993 production dates.

www.enginelabs.com

 

[moparleo]

Somewhere along the line the intakes were opened up to 2.02 . 68-70 specs. Higher compression and different cam.
The 1.8 8 are sufficient for a period 340 unless you are changing the pistons, cam, intake etc...

 

[Chryco Psycho]

I general if larger valves were installed this helps in every way done properly
The cam numbers mean nothing , is there purple paint between the lobes ?
UI would suggest replacing the cam with a known Good grind , my suggestion would be a Lunati vooDoo grind , we can help you choose .

 

[SRKlegin]

I general if larger valves were installed this helps in every way done properly
The cam numbers mean nothing , is there purple paint between the lobes ?
UI would suggest replacing the cam with a known Good grind , my suggestion would be a Lunati vooDoo grind , we can help you choose .

Man I appreciate your help...thanks.
Yes there's purple paint. Here's the particulars:
A904 3-spd automatic (no modifications (i.e shift kit)
Standard drive shaft
Not too sure what torque convertor, as I got this engine without it.
3:23 Factory sure grip rear end
340 engine: stock pistons / steel crank / factory lifters for now (depending upon cam)
I believe stock 1.5, correct?

I was entertaining a roller cam but a little voice is yelling at me not to.

 

[SRKlegin]

also looking at stock four barrel with this I found on e-bay....haven't placed bid, but I only have 14 hours left to place bid. Guy wants 249 + shipping
MOPAR Small Block 340 INTAKE Original 4 BARREL 69 DART BARRACUDA 2591915

 

[SRKlegin]

also looking at stock four barrel with this I found on e-bay....haven't placed bid, but I only have 14 hours left to place bid. Guy wants 249 + shipping
MOPAR Small Block 340 INTAKE Original 4 BARREL 69 DART BARRACUDA 2591915

I was looking at woodruff for the carburetor. Stock was carter thermo quad, correct? not too sure on cfm rating

 

[SRKlegin]

Just got done doing a bit of hunting for info, 800 cfm Thermoquad, 6000 series. Make sense?

 

[Xcudame]

73 340 would have an 800cfm Thermoquad probably part number 6340S. But any 72 to 74 Thermoquad can be rebuilt and dialed in to work. The bigger intake valves with a good valve seat cut will work well with a bigger Lunati Voodoo cam. I like the "703" cam the best for a mostly stock 340, but they seem to be temporarily unavailable. There this one, but it needs head porting and 10:1 compression to work well. Your stock 340 has the factory pistons (which were low compression), right?

 

[SRKlegin]

73 340 would have an 800cfm Thermoquad probably part number 6340S. But any 72 to 74 Thermoquad can be rebuilt and dialed in to work. The bigger intake valves with a good valve seat cut will work well with a bigger Lunati Voodoo cam. I like the "703" cam the best for a mostly stock 340, but they seem to be temporarily unavailable. There this one, but it needs head porting and 10:1 compression to work well. Your stock 340 has the factory pistons (which were low compression), right?

Yes

 

[Xcudame]

Check Amazon, shows they have 3 703 cam and lifter kits.

https://www.amazon.com/Lunati-10200703LK-Voodoo-Camshaft-Lifter/dp/B00C2J600Q/ref=mp_s_a_1_3?crid=38C5W3UU5K44S&dib=eyJ2IjoiMSJ9.fCdPYCLWTjTHaT6EKJcqzYn-WXKDolZ-4Ei0sD7_ARJLOnyaHf_1F0qXCJfB10_ix-coeh6amDSaMnmS88nuo4SvKflFIpgKwS9GyhrWd3zp8EjEq8EAkJKgZrDFXIJxIc2J9eu9BtZX-8KGlIe_GpGqhsns92TppOlsbVxmIchPH5xK7qhla4iVCjRBs7gLupPeyyo7r3vhBm-BmvrzYw.3_Bjnu2g7cBWGYm_1f1bAYPP4vkDDP0Jxl-D9Olwhf8&dib_tag=se&keywords=lunati+voodoo+cam+mopar+340&qid=1722208117&sprefix=lunati+voodoo+cam+mopar+340%2Caps%2C184&sr=8-3&ufe=app_do%3Aamzn1.fos.c3015c4a-46bb-44b9-81a4-dc28e6d374b3

 

[Xcudame]

It copied a how link you may or not be able to see.

You want this cam: Lunati 10200703LK Voodoo Camshaft Lifter Kit for Small Block Mopar