The tried and true, dime a dozen small block chevy. So far I don't have a dime into this, so all is well. ::Monster Garage Voice:: FREEBIE! 85-95 LO5 350, one piece rear main, 4 bolt mains, roller cam block w/ TBI heads the first of the "swirl port" heads. The motor has had a recent rebuild, .030" overbore and crank turned .010"/.010" more freebies. L31 vortec heads with complete fuel injection. I already removed the poppet spider. I already tore the block down and discovered why this motor was put on somebodies backburner. Cyl # 5 had an exploded piston, but did minmal damage to the cyl wall. The minor ring scuff will get taken out with another .010" overbore. BTW, I love the use of the flat tappet RV cam in a roller motor.