If anyone is interested in building a Fox speed engine, the prefered crankcase is up on eBay. Not my auction btw.https://www.ebay.com/itm/225639076072?_trkparms=ni_actn%3Anav%7Cni_nt%3AWATCH_ITEM_ENDING_SOON%7Cni_apos%3A1%7Cni_sg%3A1%7Cni_pos%3A1%7Cni_st%3ANEW%7Cni_wh%3A1%7Cni_nid%3A605531375405%7Cni_nsid%3A225639076072%7Cni_et%3A1688345809000%7Cni_bn%3A1&_trksid=p2380424.m570.l5997MM
NOT TRUE, u band my R/V version at Brodaks RAD