[melm]

Thinking of installing 85 350 TPI into 84 truck with 305. The 350 doesn't have the TPI. Will it run good with my Q Jet and intake? Also could use Performer intake and Edelbrock 650. Thanks for helping.

[cobalt327]

Originally Posted by melm

Thinking of installing 85 350 TPI into 84 truck with 305. The 350 doesn't have the TPI. Will it run good with my Q Jet and intake? Also could use Performer intake and Edelbrock 650. Thanks for helping.

Emissions regulations and smog checks aside, the 350 TPI engine will run fine w/an intake and carb.

If you're positive the engine is a 1985, the intake center bolt holes are the same as the earlier carbed engines, so use an intake designed to fit them, NOT an intake made for the revised center bolt hole angles of the '87-up heads used on the Camaro, for example.

[DoubleVision]

Don`t use the TPI`s HEI, it has no mechanical or vacuum advance, it`s advance is controlled by the computer so you`ll need a older HEI.

[melm]

Thanks for the help. Would you use the Q Jet and Performer over the Edelbrock 650 or stock 350 manifold?

[DoubleVision]

I would use a Quadrajet and the performer. For a street carb you can`t beat a Quadrajet.

[melm]

I'm considering having the heads done and not rebuilding anything else. Is that usually not a good idea?

Mel

[melm]

I see mid 90's GM Vortec heads are available for about $650. Looks like they are 64cc instead of 76cc. How much would that change my compression and what horsepower gain is likely?

[cobalt327]

It will raise the CR by about 1.25:1 on a 0.030" over 350 SBC, w/zero deck, 0.041" x 4.1" dia. gasket and 5cc valve relief FT pistons. The exact chamber and valve relief or dish volume will need to be measured to be more precise.

The power gain has been said to be 25-50 HP.