Recent content by fastmerc

Are there any published flow rates for stock 340 heads of the various castings and valve sizes??? Next would be.... how about mildly worked, ie first half inch into the ports, not really messing with bowls yet....? Cheers! Steve

OK, how dare I forget "port matching"! This was a Ford Racing (Edelbrock) head that I matched to a RPM intake for a 331 build. Quite the mismatch going INTO the head! Pulled over 300HP at the rear wheels at a modest 4000ish rpms, a very well mannered street engine. Hoping to do similar for...

OK, first, I missed the second page of replies! Quite the pictures of castings close up!!! So if any of my comments are "outdated" my bad. I can see that there are definitely "some" impediments to flow, that need to go! S Looks like a set of "you finish" heads..... With no valves...

Slanted Mark4, LOTS of good info here to believe. Some cautionary, and some to watch out for! If you don't want to mess with the negative cable when storing, get one of the pictured quick disconnects! The posters that recommend this on the NEGATIVE cable are more correct!!! Just...

Mattax, GREAT response with the illustrated bits! Thank-you! That is one sneaky place to put a ballast resistor! I'll see if I can follow that single wire back to....??? Could it be a tach feed wire? ...more to come! Steve

PS: Are J and X heads both the same combustion chamber size if the valves are indeed different here? How much smaller are the "small" valves....? Good shop manual or such recommendations for these engines?

Alrighty then! First couple of pic's are: "I don't have much of a clue things in the engine compartment!" Rest are just general purpose what I've been left with. So what is this first thing adjacent to the M/C here on the firewall? With the connector towards the bottom of it facing into...

OK, take 2.....website difficulties! Had time to snap a few pics of the engine and bits. Guessing these are the "J" markings although they look like big "U"s..... Sooooo, actual valve size remains TBD! Appears to be original carb, but not sure where numbers are and not worried at the...

Mattax, Wow! Great bits to know about dist! Hopefully I can get some time later today or tomorrow to verify some physical stuff first, before actually firing things up! .....just noticed air is missing from one of the tires..... damned cats probably stole it...... Cheers! Steve

HSorman, All good stuff!!!! Basic target numbers are good to know! Since I am "olds cool" by being, I'll fire up my stand alone tach and my timing gun and see what I've got.... Plot out a crude curve up to 3K and see where we're at! Adjust as neeeded! Any advice on creating better spark with...

Guys, ALL great responses, just what I was looking for....little bits of goodness. The head info was new to me, I can check for casting numbers to confirm, but suspect that the 71 should have the bigger valves....BUTT, confirm confirm confirm! Lifters: yah that is a crazy subject!!! I guess...

RRR, Good to know! Will see if I can't dig up the specs on it for reference. Thanks! Steve

abdywgn, Greetings! I have yet to discern all the detail of this Demon. It is a 71 model, plain as Jane 4spd car! Bench seat to boot! It appears to have been rebuilt back in the early to mid 70's when the prev owner bought the car to drive in high school......and it hasn't been touched...

Greetings! New to the Pentastar world and the rest of the world has kept me from getting anything done on my 71-72 340 Demon that I acquired a couple of years back. Clutch is still bad and my shop is packed with OPS (Other People's Stuff) at the moment, plus a failed lift install! (too thin...

Should be sold today! Spoken for..... Hope to complete deal today. Thanks for looking/replying all!