Is my truck a 50th?

[greygoose]

What about,changing the heads to 305 or 307,and after changing them what else should I do or can I do that?

[mr48chev]

Originally Posted by greygoose

What about,changing the heads to 305 or 307,and after changing them what else should I do or can I do that?

v

that is going in the wrong direction. The valves and ports are too small for the 327 to breathe properly. Those heads will work with a 283 or 265 though.

A stock set of Vortec heads is said to be worth 20 hp out of the box without other modifications to the engine.
Around here a brand new set from Gilbert Chevrolet http://gilbertautoparts.com/Cylinder_Heads/Vortec.cfm run about the same as buying a junk yard pair and having the valves done. They are about a two and a half hr drive from me though but any GM performance dealer shoud be able to get you a competative price. They do require a new intake that matches them as the older intakes won't bolt up.

[greygoose]

Thanks mr48chevy,I'm gonna look into that.

[greygoose]

Are these the heads http://store.summitracing.com/partde...5&autoview=sku

[greygoose]

Or these? http://store.summitracing.com/partde...5&autoview=sku

[otsenre]

Originally Posted by greygoose

Or these? http://store.summitracing.com/partde...5&autoview=sku

mine looks about the samr as yours other than the seats, take a look

[67chevy1series]

Originally Posted by greygoose

Or these? http://store.summitracing.com/partde...5&autoview=sku

hey what is the option number for the ''custom-comf and conv''

[bruceman1968]

Z62