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My adapter has no gaskets and no leaks. When i rebuilt the motor i used a new old stock bolt with no gasket and still no leaks. Never seen a gasket on any of my small blocks.

great info

zero/flush deck height. felpro head gaskets. so estimated CR is about 9.5 - 10.0? It has rn11yc in it now which were in it when I got it. Ran great with prior cam which was .454 lift. Now with .484 cam it seems to run rich with no carb adjustments made.

Thanks everyone!

I need input on recommended spark plug for my 340. I'm running forged flat tops with J heads with 2.02 intakes. 484 lift MP purple shaft hydraulic cam with Torker 340 intake and Holley Street Avenger 780 CFM vacuum secondaries. Header and 2 1/2 exhaust through flow masters. Chrome box...

VP23: Plymouth Valiant,Duster Premium 2 Door Hardtop G4B: 318 150HP(net) or 170HP(net) 1-2BBL 8 CYL 1974 Dodge Main, Hamtramck, MI, USA 469634: Sequence number E44: 318 cid 2 barrel V8 230hp D34: Light Duty Automatic Transmission JY9: Dark Gold Poly Exterior Color H1LL...

Do you mean E44?

I should have measured before assembling after going through the motor. It was a 25 year old build but with only 2200 miles on it. So I re-sealed complete motor and put in new cam/lifters/chain/pump. trying to estimate HP.

That's what I figured. Thanks.

What is the volume of J-heads with cast# of 3418915 and 2.02 intake 1.60 exhaust? trying to estimate my compression ratio. Running flat tops with two valve relief cuts and close to .012 below deck.

My uncle ha a Penn Yan 26ft cabin cruiser in the late 70's that had reverse rotation 340. When I think back it was amazing that the little 340 moved that heavy barge as fast as it did. He also had a 19 ft donzi with 350 gm that wasn't much faster.

P5249557AB I believe it fits all mopar v8 engines! yes even magnums need crank bolt. hopefully threads are still good?

It really does not matter what it is from I'm just happy to have a good 70 340 that came in the 74 dart sport I bought instead of the original 318. I'm just trying to document as much as possible about the car. It will get passed down to my grandson some day and want to teach him as much as...

I have motor out of car on stand with heads off. re-assembling. car is 1974 dart sport. I will need to get the vin off the right side of block so I can see what it came out of.. date is 5/6/70 so assembled in june makes sense.original crank is long gone. The crank in it looks to be 318 new...

I have engine upside down on stand..OOPS.

Yes! Thanks

great tool! Thanks!

1970 340, j heads with 2.02/1.60 minor intake porting. stock bore/stroke. replacement pistons forged flat top with valve cut outs. close to or -o- deck height. MP p4120231AE cam/lifter kit with new springs and pushrods to match. torker 340 intake with holley street avenger 780 with vac...

this number is on right front of block of 1970 340 FW340P32320228 with iron cross after it. Does this help with what car it came out of? Is there a decoder for these numbers?

Are there any free desktop dyno programs out there? Or how else can estimate H.P. from my 340?

Thanks for that info

looking for some info..I have a 1970 340 with J heads.. both have J cast on outside and 3418915 cast top and bottom. both heads have stamp 10871 on edge by front lower head bolt. left head has 360 cast on top by valve spring and other has 340 cast in same spot and also has U cast under intake...