conversion

Post by **521ofdoom** » Wed Dec 31, 1969 5:00 pm

I'm doing a change over, and I have access to the L series truck that it all came out of. As far as I can tell, it should be bolt in. I have everything from fan to rear diff. I assume I need a different radiator, but I am going to go custom for that. I'm using the L series alternator, and trying to get all the wiring, as to rid myself of this horrible 30 amp Mitsubishi Charging system. If this gets to complex, I may go to a GM one wire. Anything else I should know, like major frame differences? This is my first 521. I've had many 620's and 510's.

Post by **71-521** » Wed Dec 31, 1969 5:00 pm

you will need to cut out the old motor mounts and weld in the L-series ones...totally different styles.

Post by **521ofdoom** » Wed Dec 31, 1969 5:00 pm

my J series mounts are bolted to the frame. There's no mount pillars when you unbolt them. I would assume the L series pillars would bolt in too, from a same bodied truck. Mine is an "L521" instead of a "PL521" like most I have seen.

Post by **71-521** » Wed Dec 31, 1969 5:00 pm

look at how the J series mounts to the frame..the L series has mounts directly across from each other...

somewhere I have a pic on my other 'puter....anyone have a pic to show him?

Post by **airedout** » Wed Dec 31, 1969 5:00 pm

Your also going to need to goto the 2 piece driveshaft out of the L series truck. The slip yolk into the tranny is not the same. The a solid shaft all the way to the carrier bearing, and the rear shaft slips for axle articulation.

Post by **521ofdoom** » Wed Dec 31, 1969 5:00 pm

i ended up making my own mounts, but used a trans from a 72 620 that was just like a 510 tranny, it was the same length as the 1300 trans, and used a slip yoke. i used the origional tail shaft mount, so the lenth is the same, all i have left is cutting the old radiator extension out for the 510 radiator and the I'm putting a GM one wire alternator in, so i can use all my accessories at the same time.

Post by **airedout** » Wed Dec 31, 1969 5:00 pm

Damn, i guess i need to find a trans out of a 620 then. I want to swap the L out of my parts truck into my air bagged 521 with a J series. My only problem was when i set up the suspension, i set it up for the one piece shaft, and didnt want to change it to the 2 piece.

Post by **521ofdoom** » Wed Dec 31, 1969 5:00 pm

you just need a stock 510 trans,or a dogleg 5 speed from a 79 200sx. they use the stock 510 driveshaft, and fit L series. This 621 i pillaged was an oddball. It was a 72, but they diddn't make 620's until 73. It used the bolt on shifter, instead of the pin-in, like the 620/z car. people will usually give away the stock 510 4 speeds, because everyone goes with z-car/620 5 speeds. I have 3.90 gears in my truck from a 510 wagon and 17x8's from an 02 pathfinder, so a 4 speed is plenty good for me. I can cruise 70mph no problem.

Post by **odpl_greaseball** » Wed Dec 31, 1969 5:00 pm

Yea, 77-79 dogleg 5 speeds are the way too go as far as having an extra gear inna 521-

My brother brought up the whole "bigger tires for 4-spds" thing awhile back too,
and the more I hear about it the more I think about getting a stocker....

(spotted a nice green looking one a few days ago off of a main highway, plan on asking about it today...)

conversion

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