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If you are going to run it, which I wouldn't do without some testing or tearing down, I would be easy on it for a while.

Would this head gasket have been more helpful for you? https://www.summitracing.com/parts/mrg-1121g/overview/make/plymouth

My goal here is to try to find a good set of pistons for my 340 that will put me into the 9 to 9.5:1 compression ratio. I am on a very tight budget here. (A bunch of unexpected life expenses came up all at once while I am trying to build this) My block is excellent but I need pistons and I can...

Does this ring set fit? I found it on other site (Ebay) and it says it is for Chevy and will not fit 340 Mopar https://www.summitracing.com/parts/slp-e-251k40/overview/

So these are basically 1972 340 stock replacement pistons?

I have a 1972 Duster 340 that is getting an engine rebuild. I was looking at some silvolite pistons for it. I copied this from the description Brand: Silvolite Pistons Part Number: 1267 Condition: New Silv-O-Lite Pistons for 1968-71 Chrysler 340 5.6L V8 Standard Size, matched set Flat Top...

Thank you all. It seems that I was wrong as I do have the correct damper. Somehow in my mind, I thought differently. He still had the weighted converter on the tranny though. The weights were pretty big. Hell of a deal on the harmonic balancer!!!! I might still get one!!

Are 318 Magnum and 318 LA balancers the same too?

I just found out that my supposedly externally balanced 340 has a forged crank. My trans had the weighted torque converter for sure but now I am questioning what harmonic balancer the idiot before me, put on the car. My engine is at the machine shop right now and the balancer is not where I...

What do you recommend then?

I called Aero and got the follwing info: - The actual lift lift is .525 (The person stated that this was what I meant by spring rate) - Open spring pressure is 320lb - Spring pressure @1.650 125 lbs to seat they also stated 90 thou to coil bind (if that makes any sense) Hope this is what you...

I was going to try calling Aerohead Racing to get more info. What all should I ask them?

any other Ideas on cam selection if I am too close?

I have a stock 1972 Plymouth Duster 340. I am replacing my heads for some re-manufactured cylinder heads from Aerohead Racing w/ stainless 2.02's for the valves. The heads Aerohead racing ARO-CY-SB340. The springs are single w/ a damper spring inside of that. Seat pressure is 125 lbs. I want to...

So, here is a problem that has been bugging me. My Duster's oil smells like gas. It has been happening over the years and gets to the point that the oil needs changed. I remember a few years ago, I changed the fuel pump to see if it helped but it didn't. The car only gets started and run as I...

My 1st car was a 1968 Dodge coronet. Had the 230hp 318 w/ a Holley 4bbl (changed it to a Carter AFB). The car kicked butt on a lot of cars it shouldn't have (V8 Vega w/ a 4oo small block, Pontiac Grand Prix w/ a 455, 350 Buick Skylark and a bunch of others) the 4bbl really woke it up. I liked...