Recent content by Locomotion

Agreed! I've gotten at least a tenth better performance going from a 3310 750 vacuum secondary to a 4779 double pumper after spending time tuning both on the same combo.

Regardless of brand, many people leave out the front & rear end gaskets and just use silicone. Some end gaskets squeeze out and others are too thick or hard and don't let the intake sit low enough. Make sure the intake lines up properly with the side gaskets in place. Depending on any other...

It depends. One has to determine what .15 seconds in the 1/4 is worth - what it takes to achieve it and what it actually costs in time and money. A lot of the "worth" depends on the rules you race under. The more restrictive the rules are, the more difficult it is to make "legal" changes for a...

The best info I've heard was from testing Chrysler did between a 727 and 904 in the '70's. With both transmissions and their respective converters built to the same specs and the vehicle weight adjusted for the different transmission weights, the 904 was about .15 seconds faster in the 1/4 mile...

OEM cars are usually built with compromises leaning towards "street manners", not meant to be "beat on" and with "comfortable" shifts. But there are different "duty" levels of transmissions. (i.e.: 904, 998, 999) I've always heard that heat is the most common cause of transmission failures...

I ran JW Trans. built 904s in my Dart for years without any trans parts breaking due to outright fatigue. The few trans failures I've had were due to driveline failures first resulting in broken sprag or broken trans cases. Best numbers 11.14 @ 117 with 1.47 60' @ 3,540 lbs footbraking. Usually...

The round, raised area in the middle of the axle flange that the hole in the middle of the brake drum fits over. 4" bolt pattern Mopar axles have a smaller register.

1971 Dodge Dart short track race car This is the closest I could find. Don't know if it would be possible to contact the builder for info, leads or ideas.

Did Chrysler ever produce any "dealer promo" models of a Valiant? I've had Dart Sports & seen several other of the "sportier" models. Was it MPC who produced them? Try contacting some of the remaining model manufacturers? There were some Japanese model companies as well. I have a '72 or '73(?)...

Brand of shifter would be a start but even they could vary between models of shifter. Obviously you need one for a 904 but both you and the seller has to know if a particular bracket is for a 904 or a different brand of transmission. I believe Hurst is under the Holley banner and Summit...

I believe the originals took a socket to remove. I don't recall the size off-hand but it was a pain because there wasn't much For the socket to grab on to. The internal 3/8" drive was a welcome change.

340 cast crank engines were externally balanced also. But I don't know the size or weights of the weights used. A 340 cast crank definitely had less external weight on the converter and the balancer than a 360, so they will not interchange. I believe 340's went to cast cranks some time during...

727/904 flexplate P4529751 AB 10" x 7/16" bolt performance converter bolt pattern - 6 bolt crank. NOS, expired SFI sticker. $65.00 including shipping within the 48 states, *****SALE PENDING***** Shipped from Florida 32117 Sorry, no PayPal.

I used a 360 with Holley Strip Dominator, unported LAX heads, around 255*@.050 flat tappet cam in a 3,540+ lb car. BUT.....it had 4.86 gears, 30x9" tires and a converter that actually flashed to 4900-5400 rpm, depending on the weather. Footbraked from 3-3500 rpm, stayed well above flash thru the...

Looks like a Milodon small block. But you'll have to determine the part # based on the sump depth of the pan being used. If the pan is not Milodon, you'll have to do some careful measuring as they have 5 qt. (OEM), 7 qt. & 8 qt. pans with center (front) sumps & check internal clearances. At...