[MODERATOR'S NOTE: This topic has been covered quite extensively in the past. My recollection is that the DMC engine is a modified version of a PRV and that no direct equivalents exist.] Hi, I am new to the list but have been in love with the DMC for a long time. I will be building one step by step. I have built other cars and I have found the 4 year plan works well for me. so I have started on year one. in year one I usually do two things, intelligence (research) and engine. so for the research part I turn to the list... a few things that have been hinted at but not made 100% clear are the following. first of all the engine, I have seen in a few places that the PRV6 was in a few Volvos. my question is exactly which years and models and how different. I saw on one site that mentioned the 700 series and the 600 series. other info I need is vacuum info. if a few of you friendly folk could stick a gauge into the manifold and measure the vacuum at idle and at 2500 rpm. I plan on flow testing the heads and computerize all the specs to develop the cams and other components to make more ponies. I know DMC did this but doesn't give out the exact cam and engine mods and doesn't sell the parts without letting them install it. if I can do this I will sell the stuff in kit form so people can actually afford it. I figure two custom ground cams and exhaust kit shouldn't me more than $1000 to $2000 and you could install it your self (it isn't that hard after you get to the valve covers judging from my rebuild of a Mercedes OHC but the body will be the problem. anyway I need the info asked for above in order to start the process. I need a donor engine first and the minute I say delorean the price jumps so hopefully I can say Volvo at the junkyard instead. I await your response... Darkstar