I am a Marine/ RV service/ sales shop, and also sell parts off of damaged boats and motorhomes. I have a few 502 mag efi engines. I have rebuildable long/ short blocks, 454 mag efis, some with heavy internals, I have a 2005 8.3 350HP Cummins ISC/ with ECMs Allison 6 speed trans, and all running gear off of a wrecked Monaco Class A diesel pusher, along with all the various systems and parts for sale, I have alot of GM 8.1 496 blocks also and small block 5.7/6.2 engines, prices vary by condition and RUN/ NO RUN position. Cummins is a low hr runner that is being taken out, cleaned and serviced. the pic is just how I received the Motorhome. Trades considered depending on the Item. and percent of trade I also have 2 used Coleman Mach ac rv units 15000 btu cool only