Thread: Chevy 305 Heads On A 350

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Have you ever run 305 heads casting #416 or 601 on your 350 ? If so how did you modify them ? And what cam did you use ? And Do you think they made good power .

You will be much happier with Vortec heads

I do think you are right . But I have a set of #601 heads with new S/S valves . And screw in studs with guide plales . With the Z28 springs . I am about to start porting them out. Pockets and ports . They are going on a 355 with the 8.5 C.R pistons . The engine should have around 9.75 to 1 with these 55 to 58cc heads . The cam that I am using is a Elgin hyd 216/228 dur at 0.50 and 453in 480exh lift . I still am not sure what intake I will run . I do like the Weiand steath . COOL !

Originally Posted by tango

I do think you are right . But I have a set of #601 heads with new S/S valves . And screw in studs with guide plales . With the Z28 springs . I am about to start porting them out. Pockets and ports . They are going on a 355 with the 8.5 C.R pistons . The engine should have around 9.75 to 1 with these 55 to 58cc heads . The cam that I am using is a Elgin hyd 216/228 dur at 0.50 and 453in 480exh lift . I still am not sure what intake I will run . I do like the Weiand steath . COOL !

Check out this engine . Its just about done . I think that I will try it out in my 1989 short bed Chevy truck . Only thing its 700R trans is on its last leg . I think that I will change the 700R out with a long tail TH350 . I was told its a bolt in . And the trucks just an around town car part hauler . This truck also will get long tube headers and true dual exhaust with turbo mufflers . And at a later date a 342 rear gear . How well do you guys think this set up will work ? To have the 700R trans rebuild its big money . And for how I use the truck . I dont think the 700R will be missed .

I'm running 305 Vortec heads on my 350 vortec engine. Gives a little more compression, but not sure how much more. Supposedly they don't breath as wel on top end as 350's, but that is not what I wanted.

Don

Originally Posted by Itoldyouso

I'm running 305 Vortec heads on my 350 vortec engine. Gives a little more compression, but not sure how much more. Supposedly they don't breath as wel on top end as 350's, but that is not what I wanted.

Don

I did some port work on the #601 305HO heads that I am going to use . But I think the max RPMs of this engine will be 5500 to 5800 . I have a #2101 Edelbrock Performer intake and a 1970 350 Chevy Q-JET that I most likely will use . When its done I may take it to the track and see how it will ET .

I've heard of using 305 heads, I dont know anything as far as part #s but one of the GM techs at the local dealer constantly scrounges 305 truck heads( supposedly bigger valves in truck heads?) for his Monza drag car, says they dont flow well at all but the compression bump on a mostly stock engine gets him lil more power for no $$$