I'd have to look for it, but I belive you can get a tool from one of the cam companies that you can use to machine the guide and spring pocket (to standard sbc size). It uses a drill (you supply) and it indexes off of the valve guide. I think jegs or summit have it and it was like 50-60 bucks.
So you save the money on the machinework, buy set of springs and call it done.
Only weak link would be the pressed in studs then.
Are vortecs a good head over stock 70's and 80's castings? Hell yeah. If you can get them cheap enough even with the cost of the intake and addressing the spring issue, they still can run less than Dart's s/r torquer or other base model aftermarket heads. Buying everything new the cost savings vaporizes to a good set of aftermarket heads. But for the guys on a budget if you plan it right and shop wisely you can make power on the cheap... There were hundreds of thousands of trucks/vans/suv's built with the vortec 350 from 96 to up to 2001 (vans). While most of them are not in the boneyard (chevy trucks last a while dont they?) there still are many that show up weekly. Many of which are not excessive on mileage and might not require much to clean up if at all. Those are the heads to go after, not the new ones...
So you save the money on the machinework, buy set of springs and call it done.
Only weak link would be the pressed in studs then.
Are vortecs a good head over stock 70's and 80's castings? Hell yeah. If you can get them cheap enough even with the cost of the intake and addressing the spring issue, they still can run less than Dart's s/r torquer or other base model aftermarket heads. Buying everything new the cost savings vaporizes to a good set of aftermarket heads. But for the guys on a budget if you plan it right and shop wisely you can make power on the cheap... There were hundreds of thousands of trucks/vans/suv's built with the vortec 350 from 96 to up to 2001 (vans). While most of them are not in the boneyard (chevy trucks last a while dont they?) there still are many that show up weekly. Many of which are not excessive on mileage and might not require much to clean up if at all. Those are the heads to go after, not the new ones...