I got a 302 from my 71 4 Door Donor. The number on the block is: D1ZM 6015 AA 20A3 I have been able to determine that this motor is a 1971 Mustang motor from the D1Z part of the casting number. Is this correct and does anybody know what the rest of the numbers mean?
D1ZM isn't a Mustang block, it's a Mexican casting of the 302, basically a Mexican 289 Hi-po block. The only Mustang specific 302 blocks were the Boss 302's, even then, some were used in other applications. 20A3 is the casting date, January 20, 1973. 6015 is the part number for an engine block. AA is the suffix, really has no meaning here. Good block to build a stroker with. Only thing different about it vs the std blocks of that era was the thicker main caps. But the std main caps were never known to be weak.
Heres a huge discussion on it, too bad the pictures are removed. http://www.theturboforums.com/smf/i...b670e2e393f1746f01b636fd28cfaa&topic=23254.25
Oh thats cool, the pics must be blocked from me at my work computer. Depending on where the pics are hosted at our server blocks them.
I read thru some of that, I don't have time to read all 14 pages, but here's what I found out in the past month after aquiring a D1ZM Mexican block, 2 D8VE 302 blocks and a 69 302 block: All four castings are identical except for the bolt bosses found on the front of the Mex blocks and the crankshaft position sensor boss found on the D8VE blocks above the rear main bearing. That plus this: Both the Mex block and the D8VE-6015-A3A have the beefier main caps. The D8VE-6015-3A casting has the std main caps. The 69 C8OE block is in every respect the same as the Mex block, except for the missing bolt bosses in front and the std main caps. I weighed all 4 blocks(completely bare with the main caps bolted down) and all four weighed in at 134-136 pounds. The lighter weight was due to the 60 overbore of the D8VE-A3A. Both the C8OE and the D8VE-3A weighed 135 pounds, which is attributed to the std main caps. All four are for sale, if anyone's interested. PM me. As far as these compared to the 86-2001 roller blocks, these year's roller blocks weigh 10 pounds less (126 pounds) The 302 blocks to avoid like the plague are the 1980-85 blocks, these weigh in at 120-122 pounds. The cranks in these are also weaker too. There's absolutely nothing in an 80-86 5.0 worth building on, except maybe the rods, if you want to use stock rods.
I might have to build a stroker out of this one. This is so tempting. In one of the pics a guy made a stroker and put a girdle on the mains to tie into the oil pan studs. Looks Bullit proof.
Dont bother with the girdle waste of money. Whats your overall goal for the motor? Did it come with heads? What head castings you got? By the way good score! Do you mind me asking what you paid for it? Would love to get my hands on one!
My goal was to Bore .030 with a Summit rotating assy. and an Edelbrock 365 HP top end then add a 150 shot NOS. With the AOD and 4:11s. That was before I found out it is a Mexican Block. The numbers in the heads are 302 B*A 386 13597 they are original to the Motor as far as I know. The motor was free, it was in a 4dr and the kid had it for the 5 lug for his 67 stang. He said he sold the motor for 400 to a guy if he could take it out and deliver it. I only wanted the V8 cable, trans brace ,Belly bar ect. Week after week I called him to see if he got the motor out and he didnt. So I got tired of waiting and offered 300 for the whole car, if I took out all the 5 lug with the C4 and delivered it the next day. He took my offer. I originally didnt want the motor till I figured out what a 351 swap would take. Got lucky I guess cause I didnt want the Motor and it was headed to the scap yard. LOL
Looks like your on the right track for sure than, I'm not a big fan of the edelbrock top end kit I think your get alot more for your money with a set of twisted wedge heads or afr heads. Edelbrock stuff works great for chebby's but not blue ovals in my book. I hope you got a rear end cause that stock one not going to last that kind of torture very many stop lights LOL
I was going to go with the 8" with a yukon 4 spider limited slip. But I think Im gonna change up and go with a 9".
