Thread: Vortec questions

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i am doing a throttle body 1990 sbc they came with a flat lifter cam but block will take Gm roller parts so i and having a very very small hyd roller cam made so the map can work and no re chip and going with a Vortec type head that PBM sell i have had good luck with them and who makes them for PBM it is a big head and block maker that starts with D there good out of the box just lap in the valves give them a good bath and put them together. i do cut the valve guild down to 531 for the rigid chimney viton seals for long life .they do make a cutter for the vtech heads if you need to cut them down it a part number 4716 cuts them to .630 and is in competition products page 70