340 r block intake to oil pan

what I have here is a arca engine out of my dads cuda kit car he got right from dodge in 72- 73 371ci full race w2 heads it has been rebuilt with 12.50- 1 wisco pistons motor was a 355 cid short block w2 cylinder head when new I used this eng. for a short time in my 71 dart just added 7quart oil pan and headman w2 headers ran 10.40s at 116mph have whole motor and headers like to get 7.000 try to get some pics added soon thanks