dart little M oil restrickers?
just had major problem (#4 rod though oilpan) engine bluilder didnot restrick oil in my 434. motor had 18 runs. all good parts. coated bearings. pretty much said it was my fault for not hearing a noise the run before. the two time runs that morning 9.103 and 9.100 @ 147. i motor sounded good to me. thats why i drove 400 miles round trip and paid 300 enrty fee