305 heads

[Terrybneal]

I found a blazer for sale with a 350. He said it had 305 heads. I have always been told that a 305 head on a 350 would make the compression ratio so high,it would not run right. What do yall think?

[Truckman91]

It will run right, just have more compression, and most likely a little less flow.



Ask him what pistons are in it, and you can figure out the round about compression

[my454s10]

even with a 4-valve relive piston and 305 heads.it will be around 9.5 or 10..maybe 10.5.the stock 305 heads have small 58 cc chambers..

[Terrybneal]

so, is the 305 head a good choice, I have a set of them,so the price is right

[my454s10]

depends on what the motor is going to be used for.....they just do not flow worth a crap...in stock form...the 305 H.O motor only came with like 1.94 maybe...it may even be the small 1.84...and both had 1.50 exaust valves...and have a big o smog port rught in the center...for a stock motor or very mild motor they are ok...my cousin had a set with 1.94 and 1.60 valves in them and his car ran 11.70\'s in a ugkly monza..but it was a 400 and with that big bore motor the compression was like 12 to 1...with a 58 cc head