I went to Frankspontiacparts.com & there's no 455 blocks there right now. They post new parts all the time though. The 400 blocks are selling for $950-$1050. The #15 heads are $200 for the pair. There's a 455 stroker crank for $750, & a 400 crank for $125. Hope that helps you. Now my 2 cents: I know all too well about $ being tight, or even non-existant. If I were you I'd follow my heart & keep it if at all possible. Could be something you'd really come to regret if you sell it.