Thanks to Krazykuda and his how to;
How to Rebuild a Small Block Part 1: Block Prep
I finally got up off my *** and started cleaning up the casting flash on my LA360 block (not a magnum). I didn't think to get any pictures of before. Damn.
I still have to pull the tiny little 1/2" or so oil gallery plugs and the threaded ones as well, gotta borrow the propane torch from work to heat up the block around them, and the dipstick tube which was broken off in the block.
I used a dremel with a stone at around 20,000 rpm. It cuts fast enough for me, and doesn't leave any burrs so I am plenty happy. I may be a little obsessive about getting rid of stress risers.
I'll hit the block tomorrow with some GUNK and a scraper and a brush to get it real clean and then find and remove the rest of the casting flash. Dingle ball it next weekend so I get a good look at what I have to work with.
I'll get a pic of the casting number tomorrow, it
looks like it is 6300692 360
edit;
found it here.
Sorting Out: Chrysler’s 238, 318, 360 Engines, Doug Anderson, Automotive Rebuilder, April 2000
1989-’90
The 360 got a new block with three cast bosses in the valley for the roller lifter holddowns. Although all of these engines had fuel injection, they continued to use the cam with the long snout along with either the eccentric or the special cup-shaped washer. Both intermediate cam journals had holes to meter oil topside. The 318 and 360 cams are different and shouldn’t be interchanged. The most common block castings are 4315830 and 53006921. The later block (53006921) was used in ’91, too, so check the oil filter boss to see whether it’s a ’89-’90 or ’91 before using it for either application.
1991
This was the year of the corporate oil filter, so the 360 block was changed along with the 238 and the 318. The oil filter boss was 0.250" shorter so both the plate and adapter were modified accordingly. The rear main cap had a dowel pin and may or may not have the recess for the o-ring. The cap was still grooved for the rear pan seal. It had the old style ears for the motor mounts. The block was the 53006921 casting that was carried over from ’90, so once again you have to physically check the length of the filter boss to be sure if it fits a ’90 or ’91.
Here's the block stamping.
OK 360 0434 1
068694 713
This is the only before picture I can find right now. You can see the oil drain hole is filled with flash. When I look at it tomorrow in the light, there may be other drain holes that were just never opened up, but as it is, the others are just not there. If needed, I can drill some tomorrow.
Here I've cleaned and opened up the drain hole.
Arrived today from the Doctor!
