67 (YENKO) baldwin motion identification question

[berger]

hey joe,I wonder if yenko had first dibbs on the big blocks when they rolled off in early june 67',my car was built fifth week of may or first week of june, I guess it had to be one of the first, Warren said about that time the cars came w/ the 427s from chevy either directly to yenko or right to harrell if they were full, he seemed to imply they came w/ the 427 short block in it but then would need building up, he said they definetly didn't take receipt of the cars w/ a bunch of crate motors soon to follow or already waiting for them at the shop, Maybe the 54 list includes all ss350 conversions at yenko, and the 107 list includes the big blocks that started to follow mid year w/ 427 short blocks in them, Kevin's seems to be a mid year big block that went directly to harrell for assembly w/ receipts. The straight six vins might be factual cuz Harrell could probably take on converting these if copo dropped 427 short blocks in them to start, maybe chevy started w a few of them to get the idea how to set up the big block car for a motor that size ( such as installing a new heater box for clearance and beefier motor mounts, what does a straight six motor mount look like?( In all maybe yenko did the 54, and harrell did the other 53) Do you know anything about a vertical date stamp under the heater box near the inner fender support mine says h 17 r the 1 and r are underlined w/a dash, I have a h19 in between my drivers side door hinges , guys tell me it means august 17 and 19 but how could it if it was built in early june, does this imply a 66' diecast stamp when the body came from fisher, one guy says the r stands for right side and that their would be an L on the other side, but their clearly is not just H 19, so what could the R in H17 R stand for.