I have my car torn down to have the valves done I what to chang the cam but I have a 327 siting haer it look like i could put it in. If I put the stock heads on with my holley intake stock tb will in run like a 305 or will it have more power? The 327 has a cam in it not shur what but the rest of it is stock 69 chevy is this a good plan or run the hell out of the 305 and do something eith the new heads

 

That is a non roller motor with a cam that is most likely not FI friendly. You need a cam with 112 LSA or higher and you have to be able to burn your own chips. The stcok heads will not worj either because of the valve train differences. Whether or not it has more power depends on whats in it. You cannot geuss just based on displacement alone.

 

what is different about the valvetrain?

 

Self allinging vs non self allinging.

 

so i use my stock rockers

 

It is not that easy. You need to use a roller cam and that block would need to be machined to accept a roller cam. Also, using a roller cam would require you to use a complete roller valvetrain. You could bolt on a set of modern heads after the block is machined and re-use your old stuff but moet likely you would need different length pushrods.

 

if you can use a set of l98 on a older motor with on mods to it then I think you could use a set of lo3 heads.

 

I am having trouble understanding this statement but I think you are saying if you can use L98 heads than you can use LO3 heads. You are correct but the same conversion applies to both. You may want to do a bit more research on the 327 motor and what it takes to use a non roller motor with TBI.

 

Shifty I think your overcomplicating the roller block head swap issue. All he needs to do is use his stock rockers with standard flat tappet pushrods or use guide plates and standard flat tappet pushrods and rockers.

2KAB, do you still have the heads for the 327 or is it a short block only? If you have a complete longblock just use it with a good intake and if your unsure of the cam you could swap it out for one you know will be easier to tune a chip for. JMO.

Steve

 

Ok when you use a set of 87 and newer heads you need a set of Self allinging rockers not a rollor cam you can use a hydraulic cam setup it is not the cam that requires the Self allinging rockers it is the head.

 

yes it is a longblock but the heads have no accesory holes.

 

You also need new longer pushrods for a non roller cam (or flat tappet cam) engine. Why do you want to use 305tbi heads on a 327? If thats all you have i say go for it. the 327 is a much better starting point than the 305 and has better rpm capabilities. With a mild cam it should be a strong running combo, just don't forget your compression is going to be higher but not so bad that it should give you any real problems. You may need to run premo all the time though.

Seve

 

Correct. You can use a flat tappet or just hydraulic cam in a roller block with roller lifters and stock valvetrain. Your 327 is not a roller block though. Also, it is very hard to find a flat tappet cam that has the necessary specs that TBI tunability require.

 

I just had a valve job dun and it costed $200 so I would like to get a little life out of them?

 

Shifty you may want to reread your last post. Do not use roller lifters on a flat tappet cam. Your last statment is a little confusing too. Most stock FT cams or even mild cams are very close to the stock tbi cam. Any cam that will make good vacuum at idle sould be easy to tune for tbi or ant other efi system for that matter. I have both an 85 and an 86 IROC the have ft cams and the specs on the 85 are the same as the 87 350tpi and the specs on the 86 are almost identical to the 305tbi cam. A ft cam shouldn't be a problem to find a good one to work in his combo.

Steve

 

is this an ok cam duration at .05 216/228 lift .454/.480

 

Should be ok with a good amout of chip tuning. Thats pretty close to the lt4 hot cam. Whats the LSA on the cam?

Steve

 

You are absolutely correct. I meant to say that you can use a flat tappet cam with the right lifters in a roller block. I just did a little shopping and you can find a few mild tappet cams that would be tunable with TBI. You may have a little lope with the narrow LSA's but that is okay as long as you can tolerate it. Thanks for keeping me on my toes.

 

That amount of lift is right at the max of stock heads. You can get away with it if you have the right springs and do all of the necessary clearnace checking but it will be close. I would shoot for a cam with no more than .460" lift if you are using stock heads.