I've got the 305 out of my 89 formula and I'm going to put it in my S-10 its got 184,000 miles on it and I've got a set of 300 horse heads casting# 14096217 that are brand new and I've got a zz4 cam has anyone did anything like this with there 305 and has anyone skatered any of there 305's I beat mine prety good in my firebird and it took it well good oil presure and good cylinder presure I'm also woundering about the compression I'm going to give up going to 64 cc heads anyone think I should have them milled a bit or I'm I already going to be pushing me valve to piston clearance with .474/.501 lift any help please

 

i'm unfamiliar with the heads, but assuming they can handle the lift, you're looking around your goal.

 

Check my sig. Thats with TBI, so a carb with that setup should do well. I'd say my setup is just under 300 at the crank so with a ZZ4 cam you should be there.

 

The 305 is low on HP but it is a tank when it comes to stress. It can take a whole lot before it gives up. power that puppy up and have fun.

 

I'm not sure what pistons your engine has, flat or dished, so it's impossible to do a calculation on the CR.
But I'd suggest finding out for sure what the CR is with those heads and what your V/P clearance is as well, before you bolt them on.
Milling the heads could be the answer.
Another possibility might be to sell or trade the heads to someone who has some 305 heads with the smaller chamber.
64cc is a good chamber vol for a HP 350 and your heads could be the solution to someone elses problem.

 

My motor has flat top 4 valve relief pistons I'm going to run these head because they have awsome ports and good springs on them I'll just take the cut in comp and live with it if its weak I'll put a 125 shot on it I've got and flog it

 

I think with those 300 horse heads you are better off with a 3/4 race cam

 

what is a 3/4 race cam? I have heard that before.

 

lol good question, they are like 300 horse heads

 

OH ok. One of those things huh. Thats funny!

 

For anyone who's ever wondered
Believe it or not, this is an actual, certifiable 3/4 race cam
You can go out and buy one yourself today

270-100172
Energizer 3/4 Race Hydraulic Flat Tappet Camshaft & Lifter Kit
Lift: .450''/.450''
Duration: 274°/274°
RPM Range: 2200-5200

ROUGH IDLE, MODERATE PERFORMANCE USAGE, GOOD LOW AND MID-RANGE TORQUE AND HP, MILD BRACKET RACING, AUTO TRANS W/2500+ CONVERTER, 2600-3000 CRUISE RPM, 8.75 TO 10.0 COMPRESSION RATIO ADVISED.

Grind Number: 274 H06
Operating Range: 2200-5200 RPM
Duration Advertised: 274° Intake / 274° Exhaust
Duration @ .050'' Lift: 218° Intake / 218° Exhaust
Valve Lift w/1.5 Rockers: .450'' Intake / .450'' Exhaust
Lobe Separation Angle: 106°
Max Lift Angle: 102° ATDC Intake / 110° BTDC Exhaust
Open/Close @.050'' Cam Lift: Intake - 7° BTDC (opens) / 31° ABDC (closes)
Exhaust - 39° BBDC (opens) / (1°) BTDC (closes)

 

If you don't mill the heads with the cam you have you will be lucky if it has a170 horse shave the heads so there around 55cc install the cam and a 2800 stall all will be good.

 

I went to buy head gaskets today and the computer at autozone said I needed new head bolts what kind of crap is this there not torque to yield this motor isn't a ls1 or noyhin anybody else been told this..I'm just going to use the old bolts like I have with every othersmall block I've ever had the heads off of...and the heads I'm puting on it are from pace parts and are the 285/300 horse crate motor heads and have 180cc intake runners and are very simular to the phase II head but have exhaust crossovers.

 

They say that once head bolts have been torqued once they stretch enough that they could cause head gasket leaks. But you could probably get buy with the old ones.

 

Post the casting numbers.

All the rest of this "300 HP" this and "simular [sic] to Phase II" that and "180cc" something else, is just useless drivel. Casting numbers tell all. Nothing else is worth the bandwidth it takes to post it.

How much you want to bet that they're Hecho En Mexico 993s? In which case, they're 76cc chambers, so your CR will end up at about 7:1 by putting them on a 305.

 

14096217 are the castings. Listed in the first post.

 

my 217's are 64 cc chamber and I'm havin .040 shaved of them and runin the thinest gaskets I could find and my motor has flat tops and I'm puttin the cam in 2 degrees advanced to keep cylinder presure up this isn't my first rodeo I've been buildin motors since I was thirteen I'm almost 23 now I was just wondering if anyone had did anything like this I've never built a 305 I've built 283's two DZ302's a bunch of 355's 383's a handful of 406's anything from almost stock all the way to a 18 degree brodix headed 385 that has 14.6 to 1 over .700 lift and loves to eat valve springs (and a mustang or civic every now and then) I just wanted to know how many of you guys have acually messed around with 305 and if there any fun I'm just going to put it together and flog the **** out of it if it blows it blows I just hope it dosen't ruin my cam but if it does it does it was only a hundred bucks I didn't want to sound cocky but I proubly did thats just me sorry just wanted to let you know I wasn't some dumb kid working on his first motor I know i won't make 300 horse I'm realalistic I'll be happy if it makes 200 and I get to flog it for a while my firebird has an 96 lt1 in it now and its 300 horses maybe a little more maybe a little less but it feels awsome I just want to put this motor in my s-10 and it sound good but still be driveable and not be a tire fryer