AceOfMace

indeed, '92s Sierra CLX would be a very good donor, regardless it having 120 or 115 horses (since the 115 one has a very simple restrictor plate :) ) But take into consideration that Sierras are featured by the book because they are easily available at reasonable cost / think of the diff, it was been fabricated with different ratios for combis limousines etc. Edit: the engine code would be interesting