360 for a day

i finally yanked my dog of a 318 and put in a 75 360 the guy i got it from said had 75000 miles, swapped in summit 6901 from 318, b& m flexplate etc, fired right up, good oil pressure, went for a drive, had traction issues, it was great! got home did compressiontest out of curiousity, 100 to 120, f@#$%! went out for some smoky photos, 2nd burnout in oil pressure gauge falls to 0.drove it 2 miles to home, tickin like crazy, as i pull into driveway it went quiet and ran normal. popped hood, some oil had blown out of dipstick tube, engine didnt feel overly hot to the touch . i fired it up twice after this to check things, started great. pulling it apart right now and cam and lifters look to be in good shape, im sure bottom end isnt though. question is i may put 318 roller block back in, thinking i may put 89 360 roller cam i have laying around into it. is that cam any larger than a stock 318 cam?oh ya,long story short, next time i'll put in new oil pump instead of my back yard test and being cheap