The most members online in one day was 1, 12-31-1969.
1958 delivery, 32jeff62, 348ShoeBox, 409 Chevy Performance, 61 tripps, 61belairbubbletop, 62impala409, 62sedan, 64ss409, Austin Bubbletop, BARRYS770, BB1960, bg64ss409, bisquick, bluescreamer, Bob Core, bobs409, Brian Thompson, BRYAN FUGATE, BSL409, cheap1, chevy man, chevymusclecars, chevytaylor, Clyde Waldo, Dan Hunt, Dewman, Don Jacks, Dond409, droptop62, Fathead Racing, feeder82, Geary Trussell, GLM409, gwagon, Hardy 1955, Hoptup32, IneedAnotherBeer, Iowa 409 Guy, jdk971, Jhall, Jim Tarleton, jl59, johnnyrod, jsmay, lgclover, Licensed to kill, lnirenberg, lone 09er, LongIsland63SS409, mac1, mike bell, models916, Mr.1961, MRHP, NickD, No409, Nuts, oldskydog, paint helper 2, PAINTJOHN1, Parts, petepedlar, Phil Reed, pvs409, QB409, quik9r, raymar58409, Razorred, RCampbell, real61ss, region rat, Richard/SIA, ridgy didge, rocketmac, rodek, rogersimpala, Ronnie Russell, rstreet, Rusty Everitt, sam 15, Skip FIx, skipxt4, sonseeker, star, Swiss Impala, tellyv, THE PETE-STA, Tic's60, Tom Kochtanek, Toms63SSQB, w ogden, walkerheaders, wburge409@gmail.com, yellow wagon

The most posters in one day was 1, 12-31-1969.
1958 delivery, 62impala409, Bob Core, bobs409, Brian Thompson, Don Jacks, lnirenberg, lone 09er, Mr.1961, oldskydog, petepedlar, Phil Reed, pvs409, raymar58409, Richard/SIA, Ronnie Russell, rstreet, THE PETE-STA, w ogden

61Fever, stew, Flipper (42), Flipper_1938 (42)